Mimecast incident

Login issues on the new universal login page

Resolved after 3 hours 11 minutes, affecting United States Grid and United States B Grid and 1 more, on October 12, 2026.

monitoring Oct 12, 2026, 05:18 PM UTC

We have implemented mitigation steps to address the login issues affecting some customers globally. We are no longer seeing errors, and users should now be able to log in through the Mimecast login page as normal. Our Engineering team will continue to closely monitor availability and performance to ensure ongoing stability.

Started
Oct 12, 2026, 02:51 PM UTC
Resolved
Oct 12, 2026, 06:03 PM UTC
Duration
3h 11m
Detected by Pingoru
Oct 12, 2026, 02:51 PM UTC

Affected components

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

Update timeline

  1. identified Oct 12, 2026, 02:51 PM UTC

    We are aware of an issue affecting login to the Mimecast services for some customers globally. Users may see an error after entering a valid username and may be unable to reach the password step. We have identified the cause, and our teams are actively working on a resolution. We apologize for the disruption and will post further updates here as they become available.

  2. identified Oct 12, 2026, 03:02 PM UTC

    We are aware of an issue affecting login to the Mimecast services for some customers globally. Users may see an error after entering a valid username and may be unable to reach the password step. We have identified the cause, and our teams are actively working on a resolution. We apologize for the disruption and will post further updates here as they become available. As a workaround, please refer to below article to successfully login via respective regional URLs https://mimecastsupport.zendesk.com/hc/en-us/articles/34000362728979-Administration-Data-Centers-URLs#h_01JA7Q71GA0422N2D8BE4J0Z36

  3. monitoring Oct 12, 2026, 05:18 PM UTC

    We have implemented mitigation steps to address the login issues affecting some customers globally. We are no longer seeing errors, and users should now be able to log in through the Mimecast login page as normal. Our Engineering team will continue to closely monitor availability and performance to ensure ongoing stability.

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