Outage in Mimecast
Degraded service for SAML authentication on US, USB and UK Grids
Resolved Minor
May 19, 2026 - Started 6 days ago
- Lasted 44 minutes
Incident Report
Summary AI Generated
Mimecast experienced a 44-minute service degradation affecting SAML authentication for customers on the US, US-B, and UK grids, preventing users from logging into the Administration Console and associated applications while other authentication methods remained functional. The engineering team identified and tested a fix for what appeared to be a configuration issue causing the SAML login failures.
We are aware that some customers hosted on our US-B grid may be experiencing issues with SAML login attempts to the Administration Console and associated applications. Other authentication methods are functioning normally. We are currently investigating the issue and updates will be posted here as they become available.
Components affected
Mimecast United States B Grid Mimecast United Kingdom Grid Mimecast United States GridTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
6 days ago - at 05/19/2026 04:38PM
We are aware that some customers hosted on our US-B grid may be experiencing issues with SAML login attempts to the Administration Console and associated applications. Other authentication methods are functioning normally. We are currently investigating the issue and updates will be posted here as they become available.
6 days ago - at 05/19/2026 04:58PM
We believe we have identified the issue affecting some customers hosted on our US-B grid who are experiencing failures with SAML login attempts to the Administration Console and associated applications. Our Engineering team is actively investigating the underlying cause and is currently testing a change to validate the suspected configuration issue.
We will provide further updates as they become available.
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