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Outage in Zscaler

User Authentication Issue on Sao Paulo II

Resolved Minor
March 19, 2026 - Started 3 days ago - Lasted 1 day

Incident Report

Summary AI Generated

Zscaler experienced user authentication issues at their Sao Paulo II datacenter that affected traffic routing for users in the Americas region. The issue was initially mitigated after investigation, but resurfaced and expanded to impact the Zscaler.net cloud as well, requiring users to failover to secondary datacenters. The incident lasted 25.7 hours with teams investigating the root cause of the recurring problem.

Zscaler has detected an issue with its Sao Paulo 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). Status changes and additional details will be posted there as they become available.Latest Update - Fri, 20 Mar 2026 04:45:03 UTCThe previously mitigated issue at the Sao Paulo II datacenter has resurfaced and see can see issue happening on Zscaler.net cloud as well. Our teams are investigating the recurrence further and checking for the root cause.Latest Update - Thu, 19 Mar 2026 05:51:21 UTCWe have confirmed that services are now working as expected and the issue stands as mitigated. While performance has stabilized, our teams remain in a state of high vigilance and will continue to monitor the infrastructure closely to ensure a seamless experience for all users.Update - Fri, 20 Mar 2026 04:45:03 UTCThe previously mitigated issue at the Sao Paulo II datacenter has resurfaced. Our teams are investigating the recurrence further and checking for the root cause.

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