Zscaler

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance for AMER Region by two hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 19 Jun 2026 07:39:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler has detected an issue with the Cybersecurity Insight Report, Company Risk Score, and Patient Zero security alerts on the zscaler.net, zscloud.net, and zscalerthree.net Clouds.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Fri, 19 Jun 2026 05:52:33 UTC

Zscaler has identified the root cause as an unexpected log volume surge following a recent software update and is currently rolling out a corrected build. The fix is …

Zscaler will perform planned maintenance for the Authentication Service between 11:30 UTC and 13:30 UTC on Friday, June 19, 2026. This maintenance includes feature enhancements and bug fixes designed to improve platform reliability and performance.

During the maintenance window, users may experience intermittent login or portal access issues for approximately 30–45 minutes. Following completion of the maintenance activities, service is expected to operate normally without customer intervention.

If you experience any access issues after the maintenance window has concluded, please contact Zscaler Support for assistance.

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscloud.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester II (MAN2) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Start time is June 25, 2:00 pm PDT (June 25, 21:00 UTC)

End time is June 25, 7:00 pm PDT (June 26, 2:00 UTC)

Zscaler will be expanding its global data center footprint and performing maintenance at our Shanghai II (SHA2) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

https://config.zscaler.com/zscloud.net/cenr

Start time is June 24, 9:00 am PDT (June 24, 16:00 UTC)

End time is June 24, 2:00 pm PDT (June 24, 21:00 UTC)

Zscaler will be enabling IPv6 at our Madrid III  (MAD3) Data Center.  During the maintenance window the services through MAD3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 24, 9:00 am PDT (June 24, 16:00 UTC)

End time is June 24, 2:00 pm PDT (June 24, 21:00 UTC)

Zscaler will be enabling IPv6 at our Stockholm III (STO3) Data Center.  During the maintenance window the services through STO3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 23, 9:00 am PDT (June 23, 16:00 UTC)

End time is June 23, 2:00 pm PDT (June 23, 21:00 UTC)

Zscaler will be expanding its global data center footprint and performing maintenance at our Zurich I (ZRH1) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Start time is June 22, 10:00 am PDT (June 22, 17:00 UTC)

End time is June 22, 3:00 pm PDT (June 22, 22:00 UTC)

Zscaler will perform scheduled maintenance at our Hong Kong III (HKG3) Data Center to complete preparatory work for future IPv6 enablement. 

During the maintenance window, services through the HKG3 Data Center may be restarted in phases to minimize impact.

Other Zscaler sites and services will continue to operate normally.

Maintenance Window:

Start time is June 22, 9:00 am PDT (June 22, 16:00 UTC)

End time is June 22, 1:00 pm PDT (June 22, 20:00 UTC)

Zscaler will be enabling IPv6 at our Washington I (WAS1) Data Center.  During the maintenance window the services through WAS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 22, 6:00 pm PDT (June 23, 1:00 UTC)

End time is June 22, 11:00 pm PDT (June 23, 6:00 UTC)

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dallas I, Dallas II, New York III, New York IV datacenters on the zscaler.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 18 Jun 2026 10:41:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dallas I, Dallas II, Washington DC, Washington DC IV datacenters on the zscloud.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 18 Jun 2026 10:41:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler is investigating an issue affecting Nanolog Streaming Service (NSS) feed filtering. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Thu, 18 Jun 2026 07:27:01 UTC

Zscaler has identified a permanent fix. The fix is being deployed to ZS3 and ZS3 Cloud this weekend, with deployment to additional clouds to follow. We are actively working on the deployment plan for the remaining clouds and will …

Zscaler will be performing hardware maintenance in Tokyo IV (TYO4) Datacenter.

Scheduled Maintenance window,
   Start: 2026-06-24 12:00 UTC
   End:  2026-06-24 15:00 UTC
   (Local Time 2026-06-24 21:00 - 2026-06-25 00:00 JST)

Zscaler will be performing hardware maintenance in the Frankfurt IV (FRA4) Datacenter.

Maintenance window,
Start: 2026-06-18 20:00 CEST
End: 2026-06-18 22:00 CEST
(i.e. 2026-06-18 18:00 - 20:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Zscaler will be performing hardware maintenance in the Brussels II (PAR4) Datacenter.

Maintenance window,
Start: 2026-06-18 19:30 CEST
End: 2026-06-18 21:30 CEST
(i.e. 2026-06-18 17:30 - 19:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Thu, 18 Jun 2026 21:42:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

What is changing

Zscaler is revising the Admin login redirection process to support the ongoing phase-out of legacy standalone portals and the transition to the Experience Center. Effective June 19, 2026, Admins logging in via external IdP portals will be directed to the Zscaler Experience Center rather than …

Zscaler will be performing hardware maintenance in the Munich I (MUC1) Datacenter.

Maintenance window,
Start: 2026-06-17 20:00 CEST
End: 2026-06-17 23:00 CEST
(i.e. 2026-06-17 18:00 - 21:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Thu, 17 Jun 2026 20:13:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Manchester II (MAN2) Datacenter.

Maintenance window,
Start: 2026-06-17 22:00 BST
End: 2026-06-18 01:00 BST
(i.e. 2026-06-17 21:00 - 2026-06-18 00:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Wed, 17 Jun 2026 23:07:39 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-06-17 03:00 EDT
End: 2026-06-17 07:00 EDT
(i.e. 2026-06-17 07:00 - 11:00 UTC)

Update - Wed, 17 Jun 2026 09:56:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscloud.net cloud. This maintenance can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 16 Jun 2026 08:22:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscaler.net cloud. This maintenance can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 16 Jun 2026 09:02:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on June 15, 2026, we would like to notify you of the upcoming data center expansions at the locations listed below. These would be available anytime on or after August 14, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

We recommend that you add the IP address …

Zscaler will be enabling IPv6 at our Johannesburg III (JNB3) Data Center.  During the maintenance window the services through JNB3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 17, 9:00 am PDT (June 17, 16:00 UTC)

End time is June 17, 6:00 pm PDT (June 18, 1:00 UTC)

• Update 6/17: Extending Maintenance

Update - Thu, 18 Jun 2026 01:04:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our Tokyo IV (TYO4) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Start time is June 17, 9:00 am PDT (June 17, 16:00 UTC)

End time is June 17, 2:00 pm PDT (June 17, 21:00 UTC)

Update - Wed, 17 Jun 2026 20:38:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler is investigating an issue that may affect connectivity when accessing a subset of destinations. Based on our current assessment, impacted customers may experience application access failures, connection timeouts, and website reachability issues. The impact is intermittent and may vary depending on the service path used to process individual user sessions, including traffic traversing Public Service Edge and Private Service Edge infrastructure.

Our teams are actively investigating to determine the cause and fully assess the scope of impact. The customer impact described above reflects our current understanding and may be updated as the investigation progresses.

We will provide additional updates as more …

Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.

Start Time: 2026-07-03 14:00:00 UTC
End Time: 2026-07-03 22:00:00 UTC
(Datacenter Local Time  2026-07-03 22:00 - 2026-07-04 06:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 14 Jun 2026 08:06:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Madrid IV (MAD4) Data Center.  During the maintenance window the services through MAD4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 16, 10:00 am PDT (June 16, 17:00 UTC)

End time is June 16, 4:00 pm PDT (June 16, 22:00 UTC)

Update - Tue, 16 Jun 2026 23:11:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our Osaka I (OSA1) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Start time is June 16, 9:00 am PDT (June 16, 16:00 UTC)

End time is June 16, 4:00 pm PDT (June 16, 23:00 UTC)

• Update 6/16: Extending Maintenance

Update - Tue, 16 Jun 2026 23:02:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional …

Zscaler will be enabling IPv6 at our Chicago (CHI1) Data Center.  During the maintenance window the services through CHI1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 15, 6:00 pm PDT (June 16, 1:00 UTC)

End time is June 15, 11:00 pm PDT (June 16, 6:00 UTC)

Update - Tue, 16 Jun 2026 06:11:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler has detected an issue with its private.zscaler.com Cloud. We are currently investigating period of slowness, latency or connection timeouts while accessing ZPA Applications.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Mon, 15 Jun 2026 23:49:32 UTC

Following a period …

Zscaler will be expanding its global data center footprint and performing maintenance at our New Delhi I (DEL1) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is June 15, 10:00 am PDT (June 15, 17:00 UTC)

End time is June 15, 5:00 pm PDT (June 16, 00:00 UTC)

• Update 6/15: Extending maintenance

Update - Tue, 16 Jun 2026 00:12:43 UTC

This activity has been completed. Please contact Zscaler Support if you …

Zscaler will be expanding its global data center footprint and performing maintenance at our Mumbai VI (BOM6) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Maintenance Window:

Start time is June 15, 10:00 am PDT (June 15, 17:00 UTC)

End time is June 15, 6:00 pm PDT (June 16, 1:00 UTC)

• Update 6/15: Extending maintenance

Update - Tue, 16 Jun 2026 04:00:56 UTC

This activity has been completed. Please contact Zscaler Support if you have …

Zscaler will be expanding its global data center footprint and performing maintenance at our Chennai III (MAA3) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is June 12, 2:00 pm PDT (June 12, 21:00 UTC)

End time is June 12, 7:00 pm PDT (June 13, 2:00 UTC)

Update - Sat, 13 Jun 2026 02:26:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Thursday at 8:00 PM Pacific Time on June 11, 2026 (Friday, June 12, 2026 03:00 AM UTC), and can take up to 3 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 12 Jun 2026 06:53:09 UTC

This activity has been completed. Please contact Zscaler Support if you have …

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 12:00 AM Pacific Time on June 12, 2026 (Friday, June 12, 2026 07:00 AM UTC), and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will …

Zscaler has detected an issue with the administration UI on its zscaler.net Cloud. We are investigating periods of slowness, connection timeouts and/or increased latency. 

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Thu, 11 Jun 2026 19:33:26 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain …

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Chicago, New York, Dallas, Atlanta, Washington datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 09:00 PM Pacific Time on June 11, 2026 (Friday, June 12, 2026 4:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 12 Jun 2026 06:41:45 UTC

This activity has been completed. …

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the London, Frankfurt, Manchester, Amsterdam, Zurich datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 01:00 PM Pacific Time on June 11, 2026 (Thursday, June 11, 2026 08:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Latest Update - Thu, 11 Jun 2026 23:55:30 UTC

This activity has been completed. …

Zscaler performs weekly service updates to continuously enhance cloud performance, introduce new capabilities, and optimize platform services in alignment with its service continuity policy. As part of this ongoing commitment to stability and resiliency, Zscaler is updating its predefined weekly maintenance windows to better support the full range of cloud services and functions while minimizing potential impact to customers.

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Zscaler performs weekly service updates to continuously enhance cloud performance, introduce new capabilities, and optimize platform services in alignment with its service continuity policy. As part of this ongoing commitment to stability and resiliency, Zscaler is updating its predefined weekly maintenance windows to better support the full range of cloud services and functions while minimizing potential impact to customers.

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Zscaler performs weekly service updates to continuously enhance cloud performance, introduce new capabilities, and optimize platform services in alignment with its service continuity policy. As part of this ongoing commitment to stability and resiliency, Zscaler is updating its predefined weekly maintenance windows to better support the full range of cloud services and functions while minimizing potential impact to customers.

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Zscaler performs weekly service updates to continuously enhance cloud performance, introduce new capabilities, and optimize platform services in alignment with its service continuity policy. As part of this ongoing commitment to stability and resiliency, Zscaler is updating its predefined weekly maintenance windows to better support the full range of cloud services and functions while minimizing potential impact to customers.

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Zscaler performs weekly service updates to continuously enhance cloud performance, introduce new capabilities, and optimize platform services in alignment with its service continuity policy. As part of this ongoing commitment to stability and resiliency, Zscaler is updating its predefined weekly maintenance windows to better support the full range of cloud services and functions while minimizing potential impact to customers.

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Zscaler will be performing hardware maintenance in Singapore V (SIN5) Datacenter.

Scheduled Maintenance window,
   Start: 2026-06-12 12:00 UTC
   End:  2026-06-12 15:00 UTC
   (Local Time 2026-06-12 20:00 - 2026-06-12 23:00 GMT+8)

Update - Fri, 12 Jun 2026 13:54:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Zurich I (ZRH1) Datacenter.

Maintenance window,
Start: 2026-06-10 18:00 CEST
End: 2026-06-10 22:00 CEST
(i.e. 2026-06-10 16:00 - 20:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact. 
 

[UPDATE: Extending trust an additional two hours]

Update - Wed, 10 Jun 2026 18:43:03 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the San Francisco IV datacenter on the zscloud.net and zscalerthree.net clouds. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 06 Jun 2026 08:11:21 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on our logging clusters. This maintenance is scheduled for Friday, June 05, 2026, at 9:45 PM Pacific Time and may take up to 3 hours to complete.

During maintenance, audit log viewing and downloads via the ZIA, ZDX, and ZTW administration UI or API will be unavailable. However, all logs collected during this period will be available after the maintenance ends.

Latest Update - Sat, 06 Jun 2026 11:39:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 06 Jun 2026 …

Zscaler has identified an issue affecting Data Fabric. Web Log and Firewall transaction data delivery to Breach Predictor and Red Canary is delayed. Other logging and data collection services remain operational.

Zscaler teams are actively working to restore normal data processing and will provide updates as progress is made. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Zscaler has detected an issue with our Hyderabad I (ZSN), Chennai II (ZSN), New Delhi I (ZSN) and Mumbai VI (ZS3) Data center and is currently investigating the matter.  Customers may encounter disconnections, periods of slowness or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. 

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional …

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Partner Admin UI will not be available. This maintenance can take up to 30 minutes to complete. All the logs that are collected during this period will be available after the maintenance ends.

Update - Fri, 05 Jun 2026 08:47:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the San Francisco IV datacenter on the zscaler.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 05 Jun 2026 10:36:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing an urgent maintenance on websites https://sitereview.zscaler.com/ and http://filecheck.zscaler.com/ . This maintenance is scheduled for Thursday at 11:45 PM Pacific Time on June 4, 2026 (Friday, June 5, 2026 06:45 AM UTC), and can take up to 2 hours to complete.For more information, please check our FAQ. If you need further assistance, contact Zscaler Support with reference to this incident. Status changes will be updated here when available. 

Update - Fri, 05 Jun 2026 07:35:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing urgent hardware maintenance in the Lagos III (LOS3) Datacenter.

Maintenance window,
Start: 2026-06-05 04:00 WAT
End:  2026-06-05 08:00 WAT
(i.e. 2026-06-05 03:00 - 07:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact. 

Update - Fri, 05 Jun 2026 04:08:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the London V (LON5) Datacenter.

Maintenance window,
Start: 2026-06-09 21:00 BST
End: 2026-06-10 01:30 BST
(i.e. 2026-06-09 20:00 - 2026-06-10 00:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[UPDATE: Extending trust an additional two hours due to resource conflict]

Update - Tue, 09 Jun 2026 23:31:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler has identified and is investigating an issue affecting CASB SaaS Security scanning for OpenAI (ChatGPT). Customers may experience delays in security scan results and related incident reporting for OpenAI content. 

Zscaler teams are actively investigating the issue and working to restore services. We will provide additional updates as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 12:00 AM Pacific Time on June 5, 2026 (Friday, June 5, 2026 07:00 AM UTC), and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will …

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Boston I datacenter on the zscalertwo.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 04 Jun 2026 10:06:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Thursday at 06:00 AM UTC on 04 June, 2026, and can take up to 2 hours to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Latest Update - Thu, 04 Jun 2026 09:51:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update …

Zscaler will be performing hardware maintenance in the Manchester I (MAN1) Datacenter.

Maintenance window,
Start: 2026-06-05 21:00 BST
End: 2026-06-05 23:30 BST
(i.e. 2026-06-05 20:00 - 22:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 05 Jun 2026 21:26:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Frankfurt VI (FRA6) Data Center.  During the maintenance window the services through FRA6 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 4, 11:00 am PDT (June 4, 18:00 UTC)

End time is June 4, 4:00 pm PDT (June 4, 23:00 UTC)

Update - Thu, 04 Jun 2026 23:26:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 05 Jun 2026 18:33:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 04 Jun 2026 18:28:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Madrid III (MAD3) Datacenter.

Maintenance window,
Start: 2026-06-05 03:00 CEST
End:  2026-06-05 06:00 CEST
(i.e. 2025-06-05 01:00 - 04:00 UTC)

Update - Fri, 05 Jun 2026 03:37:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on June 3rd, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Wed, 03 Jun 2026 05:50:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Frankfurt VI (FRA6) Data Center.  During the maintenance window the services through FRA6 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 4, 9:00 am PDT (June 4, 16:00 UTC)

End time is June 4, 2:00 pm PDT (June 4, 21:00 UTC)

Zscaler is aware of and investigating an issue affecting user-based filtering across portions of the ZIA Admin UI and Experience Center. Customers may be unable to search for, locate, or select specific users when applying user filters, which may impact user-specific analysis and administrative workflows.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
   Start:  2026-06-04 02:00 UTC
   End:   2026-06-04 05:00 UTC
   (Local Time 2026-06-03 19:00 - 2026-06-03 22:00)

Update - Thu, 04 Jun 2026 04:08:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the San Francisco IV datacenter on the zscalerthree.net, zscalertwo.net, zscloud.net clouds. This maintenance can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 02 Jun 2026 08:44:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on June 1, 2026, we would like to notify you of the upcoming new data centers and expansions at the locations listed below. These would be available anytime on or after July 31, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Zscaler will be enabling IPv6 at our London III (LON3) Data Center.  During the maintenance window the services through LON3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 3, 3:00 pm PDT (June 3, 22:00 UTC)

End time is June 3, 8:00 pm PDT (June 4, 3:00 UTC)

• Update 6/2: Maintenance window time change

Update - Thu, 04 Jun 2026 03:21:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on June 1, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after July 31, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

For more information, please visit:

https://config.zscaler.com/zscaler.net/hubs

https://config.zscaler.com/zscloud.net/hubs

https://config.zscaler.com/zscalerone.net/hubs

https://config.zscaler.com/zscalertwo.net/hubs

https://config.zscaler.com/zscalerthree.net/hubs

https://config.zscaler.com/zdxcloud.net/hubs

If …

Zscaler will be expanding its global data center footprint and performing maintenance at our Frankfurt VI (FRA6) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is June 18, 9:00 am PDT (June 18, 16:00 UTC)

End time is June 18, 2:00 pm PDT (June 18, 21:00 UTC)

• Update 6/12/26: Rescheduled Maintenance

Update - Thu, 18 Jun 2026 20:06:45 UTC

This activity has been completed. Please contact Zscaler Support if you have …

Zscaler will be expanding its global data center footprint and performing maintenance at our Tokyo V (TYO5) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Start time is June 5, 7:00 am PDT (June 5, 14:00 UTC)

End time is June 5, 2:00 pm PDT (June 5, 21:00 UTC)

Update - Fri, 05 Jun 2026 20:41:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Tokyo V (TYO5) Data Center.  During the maintenance window the services through TYO5 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 5, 7:00 am PDT (June 5, 14:00 UTC)

End time is June 5, 2:00 pm PDT (June 5, 21:00 UTC)

Zscaler will be enabling IPv6 at our Chicago II (CHI2) Data Center.  During the maintenance window the services through CHI2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 4, 6:00 pm PDT (June 5, 1:00 UTC)

End time is June 4, 11:00 pm PDT (June 5, 6:00 UTC)

Update - Fri, 05 Jun 2026 03:38:14 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Dusseldorf I (DUS1) Data Center.  During the maintenance window the services through DUS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 3, 9:00 am PDT (June 3, 16:00 UTC)

End time is June 3, 2:00 pm PDT (June 3, 21:00 UTC)

Update - Wed, 03 Jun 2026 20:24:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our London III (LON3) Data Center.  During the maintenance window the services through LON3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 2, 2:00 pm PDT (June 2, 21:00 UTC)

End time is June 2, 10:00 pm PDT (June 3, 5:00 UTC)

• Update 6/1: Corrected UTC time
• Update 6/2: Time window adjusted
• Update 6/2: Maintenance Extended

Update - Wed, 03 Jun 2026 05:05:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester II (MAN2) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is June 2, 2:00 pm PDT (June 2, 21:00 UTC)

End time is June 2, 7:00 pm PDT (June 3, 2:00 UTC)

Zscaler will be performing hardware maintenance in the Hong Kong III (HKG3) Datacenter.

Maintenance window,
Start: 2026-06-03 19:00 HKT
End: 2026-06-03 21:00 HKT
(i.e. 2026-06-03 11:00 - 13:00 UTC)

[Update] Trust is extended till 22:00HKT due to unforeseen issues with DC logistics.

Update - Wed, 03 Jun 2026 13:34:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-06-03 03:00 EDT
End: 2026-06-03 07:00 EDT
(i.e. 2026-06-03 07:00 - 11:00 UTC)

Update - Wed, 03 Jun 2026 10:53:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on its zscalerthree.net Cloud. 

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Mon, 01 Jun 2026 18:08:47 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the …

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on June 1st, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Wed, 01 Jun 2026 11:45:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Chicago I (CHI1) Data Center.  During the maintenance window the services through CHI1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 1, 6:00 pm PDT (June 2, 1:00 UTC)

End time is June 1, 11:00 pm PDT (June 2, 6:00 UTC)

Update - Tue, 02 Jun 2026 08:19:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our London V (LON5) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Maintenance Window:

Start time is June 1, 1:00 pm PDT (June 1, 20:00 UTC)

End time is June 1, 6:00 pm PDT (June 2, 1:00 UTC)

Update - Tue, 02 Jun 2026 01:04:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will perform planned maintenance for the ZIdentity (ZID) service between 07:00 UTC and 11:00 UTC on Saturday, May 30, 2026. This maintenance includes feature enhancements and bug fixes designed to improve platform reliability and performance.

During the maintenance window, users may experience intermittent login or portal access issues for approximately 30–45 minutes. Following completion of the maintenance activities, service is expected to operate normally without customer intervention.

If you experience any access issues after the maintenance window has concluded, please contact Zscaler Support for assistance.

Update - Sat, 30 May 2026 18:08:41 UTC

This activity has been completed. Please contact Zscaler Support …

Zscaler will be performing an urgent maintenance on the private.zscaler.com cloud on Friday, May 29, 2026, starting at 06:15 PM UTC. During this maintenance window, Privileged Remote Access (PRA) sessions may be briefly disrupted. If a session disconnects, users will need to manually reconnect.

Update - Sun, 31 May 2026 14:48:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Vienna I (VIE1) Datacenter.

Maintenance window,
Start: 2026-06-03 21:30 CEST
End: 2026-06-03 23:30 CEST
(i.e. 2026-06-03 19:30 - 21:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 03 Jun 2026 21:02:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing an urgent maintenance on the private.zscaler.com cloud on Friday, May 29, 2026, starting at 07:45 AM UTC. During this maintenance window, Privileged Remote Access (PRA) sessions may be briefly disrupted. If a session disconnects, users will need to manually reconnect.

Update - Fri, 29 May 2026 09:44:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

We will be performing planned maintenance on our platform infrastructure in the Prod EMEA region to enhance availability and resiliency.  Some customers may witness below impact during this maintenance window:

• Momentary disconnect and auto-reconnect of zcc.
• Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sun, 31 May 2026 03:23:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the Manchester II (MAN2) Datacenter.

Maintenance window,
Start: 2026-05-29 21:00 BST
End: 2026-05-29 23:00 BST
(i.e. 2026-05-29 20:00 - 22:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 29 May 2026 21:45:59 UTC Maintenance Completed

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing scheduled maintenance in Taipei II (TPE2) to enable Zscaler Extranet Application Support. We expect minimal to no impact to services during the maintenance window.

Other Zscaler sites and services will continue to operate normally.

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

https://config.zscaler.com/zscalertwo.net/cenr

https://config.zscaler.com/zscalerthree.net/cenr

https://config.zscaler.com/zscloud.net/cenr

Maintenance Window:

Start time is May 29, 10:00 am PDT (May 29, 17:00 UTC)

End time is May 29, 12:00 pm PDT (May 29, 19:00 UTC)

Update - Fri, 29 May 2026 23:10:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

A subset of users accessing Experience Center may have experienced intermittent 401 Unauthorized errors impacting Experience Center pages, actions, and certain Experience Center driven automations. In some cases, users may have observed failed page loads or authentication-related retries.

Zscaler identified the issue within infrastructure supporting authentication and session validation services in the US West region. Mitigation actions were completed by redirecting traffic to an alternate region, after which service stability was restored. Monitoring remains in place to ensure ongoing service stability.

For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional …

Zscaler has identified an issue impacting Zoom Call Quality Monitoring (CQM) within ZDX, where Zoom webhook data is not currently being received as expected. As a result, Zoom call quality metrics may appear delayed, stale, or unavailable in the ZDX portal. Zscaler is actively investigating the issue and working to restore normal data processing.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Zscaler will be enabling IPv6 at our Canberra I (CBR1) Data Center.  During the maintenance window the services through CBR1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 12, 7:00 am PDT (June 12, 14:00 UTC)

End time is June 12, 2:00 pm PDT (June 12,  21:00 UTC)

• Update 6/8: Rescheduled

Update - Fri, 12 Jun 2026 23:07:40 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Maintenance Window:

Start time is May 28, 6:00 pm PDT (May 29, 1:00 UTC)

End time is May 28, 11:00 pm PDT (May 29, 6:00 UTC)

Update - Fri, 29 May 2026 05:51:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Warsaw II (WAW2) Data Center.  During the maintenance window the services through WAW2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is May 28, 9:00 am PDT (May 28, 16:00 UTC)

End time is May 28, 3:00 pm PDT (May 28, 22:00 UTC)

Update - Thu, 28 May 2026 22:15:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be enabling IPv6 at our Hong Kong III (HKG3) Data Center.  During the maintenance window the services through HKG3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 23, 9:00 am PDT (June 23, 16:00 UTC)

End time is June 23, 4:00 pm PDT (June 23, 23:00 UTC)

• Update 6/18: Maintenance Rescheduled

Zscaler will be expanding its global data center footprint and performing maintenance at our Seattle I (SEA1) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalertwo.net/cenr

Maintenance Window:

Start time is May 27, 6:00 pm PDT (May 28, 1:00 UTC)

End time is May 27, 11:00 pm PDT (May 28, 6:00 UTC)

Update - Thu, 28 May 2026 16:14:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-05-28 19:00 EST
End: 2026-05-28 21:00 EST
(i.e. 2026-05-28 23:00 - 2026-05-29 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[UPDATED: Corrected UTC Time]

Update - Fri, 29 May 2026 00:36:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing critical hardware maintenance in the Brussels II (BRU2) Datacenter.

Maintenance window,
Start: 2026-05-28 22:00 CEST
End: 2026-05-29 03:00 CEST
(i.e. 2026-05-28 20:00 - 2026-05-29 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 28 May 2026 23:19:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our Chennai III (MAA3) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is May 31, 8:00 am PDT (May 31, 15:00 UTC)

End time is May 31, 1:00 pm PDT (May 31, 20:00 UTC)

• Update 5/27: Maintenance Postponed
• Update 5/29: Maintenance scheduled

Update - Sun, 31 May 2026 20:02:38 UTC

This activity has been completed. Please contact Zscaler Support …

Zscaler is investigating an issue with ZIdentity Portal on our zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net Cloud. Status changes will be updated here as they become available.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Sun, 24 May 2026 06:43:04 UTC

Zscaler identified the issue and implemented …

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud (Asia Pacific Region) by 4 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 23 May 2026 20:40:15 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscalertwo.net cloud by 2 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed

Update - Sat, 23 May 2026 02:17:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our London III (LON3) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is May 27, 1:00 pm PDT (May 27, 20:00 UTC)

End time is May 27, 6:00 pm PDT (May 28, 1:00 UTC)

Update - Thu, 28 May 2026 01:17:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be expanding its global data center footprint and performing maintenance at our Stockholm III (STO3) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is May 26, 9:00 am PDT (May 26, 16:00 UTC)

End time is May 26, 2:00 pm PDT (May 26, 21:00 UTC)

Update - Tue, 26 May 2026 20:53:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing hardware maintenance in Manchester 1 (MAN1) Datacenter.

Maintenance window,
Start: 2026-05-26 21:00 UTC
End:   2026-05-27 02:00 UTC
(Local Time 2026-05-26 22:00 - 2026-05-27 03:00 BST)
 

Expect to have brief interruptions during the maintenance window.

Update - Wed, 27 May 2026 01:19:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Friday at 06:00 AM UTC on 22 May, 2026, and can take up to 2 hours to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Update - Fri, 22 May 2026 07:56:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on our logging clusters. This maintenance is scheduled for Friday, May 22, 2026, at 6:00 PM Pacific Time (Saturday, May 23, 2026, 1:00 AM UTC) and may take up to 4 hours to complete.

During maintenance, audit log viewing and downloads via the ZIA, ZDX, and ZTW administration UI or API will be unavailable. However, all logs collected during this period will be available after the maintenance ends.
 

Update - Sat, 23 May 2026 03:02:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 01:00 AM Pacific Time on May 22, 2026 (Friday, May 22, 2026 08:00 AM UTC), and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will …

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscalerthree.net cloud by 2 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed

Update - Fri, 22 May 2026 01:02:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler will be performing scheduled maintenance on multiple sites to enable Zscaler Extranet Application Support. We expect minimal to no impact to services during the maintenance window.

Other Zscaler sites and services will continue to operate normally.

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is May 22, 2:00 pm PDT (May 22, 21:00 UTC)

End time is May 22, 7:00 pm PDT (May 23, 2:00 UTC)

Update - Sat, 23 May 2026 01:46:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscalertwo.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on May 23, 2026 (Saturday, May 23, 2026 01:00 PM UTC), and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will …

Zscaler has identified an issue affecting the zdxcloud.net cloud. As a result, the Packet Capture Probing option is currently temporarily unavailable when starting a New Diagnostics Session.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Mon, 25 May 2026 04:48:22 UTC

Zscaler has implemented a permanent fix for the control plane issue …

Zscaler will be expanding its global data center footprint and performing maintenance at our Vienna I (VIE1) data center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscaler.net/cenr

Maintenance Window:

Start time is May 21, 9:00 am PDT (May 21, 16:00 UTC)

End time is May 21, 5:00 pm PDT (May 22, 00:00 UTC)

• Update 5/21: Extending Maintenance

Update - Fri, 22 May 2026 00:48:24 UTC

This activity has been completed. Please contact Zscaler Support if you have …