Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved.
Root Cause: Preliminary root cause is attributed to an internal backend infrastructure issue, which has since been fully resolved.
Following the actions previously taken by Zscaler, the incident has been resolved.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Services have recovered following remediation of a network configuration issue by our infrastructure partner. We are continuing to monitor the environment to ensure stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Tokyo IV and Tokyo V Data Center Issue - zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
The performance issue has been resolved. The degradation was observed between 0800–1000 Japan time following resumption of business activity post a holiday period, and recovered without any intervention. The environment is confirmed stable.
Legacy Incident Archive
453 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
May 2026
Dallas II Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be enabling IPv6 at our Dallas II (DFW2) Data Center. During the maintenance window the services through DFW2 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 14, 6:00 pm PDT (May 15, 1:00 UTC)End time is May 14, 11:00 pm PDT (May 15, 6:00 UTC)
Zscaler will be enabling IPv6 at our Frankfurt IV (FRA4) Data Center. During the maintenance window the services through FRA4 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 13, 9:00 am PDT (May 13, 16:00 UTC)End time is May 13, 4:00 pm PDT (May 13, 23:00 UTC)Update - Wed, 13 May 2026 23:19:31 UTCThis activity has been completed. Please contact Zscaler Suppo...
Zscaler will be enabling IPv6 at our Dallas I (DFW1) Data Center. During the maintenance window the services through DFW1 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 12, 6:00 pm PDT (May 13, 1:00 UTC)End time is May 12, 12:00 pm PDT (May 13, 7:00 UTC)Update - Wed, 13 May 2026 07:13:20 UTCThis activity has been completed. Please contact Zscaler Support if...
Perth I (PER1) Datacenter Network Maintenance - zscalertwo.net
majorSource not attested
Last archived state: investigating
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investigating
Zscaler will be performing hardware maintenance in Perth I (PER1) Datacenter.Maintenance window: Start: 2026-05-12 12:00 UTC End: 2026-05-12 15:00 UTC (Local Time 2026-05-12 20:00 - 2026-05-12 23:00 AWST)Update - Tue, 12 May 2026 14:00:37 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Atlanta III (ATL3) Datacenter Network Maintenance - zscalertwo.net, private.zscaler.com
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Atlanta III (ATL3) Datacenter.Scheduled Maintenance window, Start: 2026-05-14 02:00 UTC End: 2026-05-14 06:00 UTC (Local Time 2026-05-13 22:00 - 2026-05-14 02:00)
User Authentication Issue on Beijing III and Shanghai II datacenter - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its Beijing III, Shanghai II datacenter and is currently investigating the matter. 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)....
China Premium Access Plus Beijing Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
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investigating
Beijing V 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: 2026-05-27 20:00:00 UTCEnd Time: 2026-05-27 21:00:00 UTC(Datacenter Local Time 2026-05-28 04:00 - 2026-05-28 05:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might be observed during t...
China Premium Access Plus Beijing Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Beijing V 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: 2026-05-14 16:00:00 UTCEnd Time: 2026-05-14 17:00:00 UTC(Datacenter Local Time 2026-05-15 00:00 - 2026-05-15 01:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might be observed during t...
Urgent Maintenance - zdxcloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Sunday at 03:05 AM UTC on 10th May, 2026, and can take up to 1 hour 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 - Sun, 10 May ...
Urgent Maintenance - zdxcloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Saturday at 03:30 AM UTC on 9th May, 2026, and can take up to 1 hour 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 - Sat, 09 May...
