Mimecast incident

Degraded Service – Administration Console Authentication issue

Minor Resolved View vendor source →

Mimecast experienced a minor incident on August 24, 2026 affecting United States Grid and United States B Grid and 1 more component, lasting 1h 39m. The incident has been resolved; the full update timeline is below.

Started
Aug 24, 2026, 03:08 PM UTC
Resolved
Aug 24, 2026, 04:47 PM UTC
Duration
1h 39m
Detected by Pingoru
Aug 24, 2026, 03:08 PM UTC

Affected components

United States GridUnited States B GridUnited Kingdom GridSouth African GridAustralian GridGerman GridCanadian GridOffshore Grid (Offshore Grid — Administration Console)

Update timeline

  1. identified Aug 24, 2026, 03:08 PM UTC

    We have identified the cause of authentication issues affecting the Administration Console for some customers globally. Email flow and other services are not impacted. Our teams are actively working on a resolution, and further updates will be posted here as they become available.

  2. identified Aug 24, 2026, 03:09 PM UTC

    We have identified the cause of authentication issues affecting the Administration Console for some customers. Expect to see intermittent failures and high latency. Email flow and other services are not impacted. Our teams are actively working on a resolution, and further updates will be posted here as they become available.

  3. monitoring Aug 24, 2026, 03:18 PM UTC

    We have taken mitigation steps and believe we have resolved the issue causing login failures and disruption to Administration Console for some customers across multiple regions. Our Engineering team is closely monitoring the situation as services continue to stabilize and return to normal levels. We will provide further updates here.