Outage in Duo Security
All Deployments - Entra 504 Gateway Timeouts
Resolved MinorIncident Report
Summary AI Generated
Duo Security experienced 504 gateway timeouts when users attempted to access Microsoft Entra (formerly Azure AD) and Duo was called for multi-factor authentication, preventing users from logging into Microsoft products like Outlook and Teams. The Core Authentication Service was affected for 2.9 hours across all deployments. The issue was resolved after deploying a fix, restoring normal authentication functionality.
We are currently investigating an issue where 504 Gateway timeouts are present when accessing Entra when Duo is called for MFA. We are working to resolve as quickly as possible.
Components affected
Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication Service Duo Security Core Authentication ServiceNeed to monitor Duo Security outages?
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Latest Updates ( sorted recent to last )
RESOLVED
2 days ago - at 02/23/2026 05:52PM
The issue causing 504 gateway timeouts during Microsoft Entra logins when Duo MFA was called has been fully resolved. Authentication services are operating normally at this time.
We will share a root cause analysis once it becomes available.
MONITORING
2 days ago - at 02/23/2026 04:38PM
We have deployed a fix for the gateway timeouts and are now seeing successful authentications. We are currently monitoring for any further issues.
INVESTIGATING
2 days ago - at 02/23/2026 04:20PM
We are continuing to investigate an issue where 504 Gateway timeouts are present when accessing Entra when Duo is called for MFA. We are working with our respective partners to resolve as quickly as possible.
INVESTIGATING
2 days ago - at 02/23/2026 03:04PM
We are currently investigating an issue where 504 Gateway timeouts are present when accessing Entra when Duo is called for MFA. We are working to resolve as quickly as possible.
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