Outlook login failure for all users (HTTP 500 error)

Assorted Mac Impex 0 Reputation points
2026-11-13T11:55:44.7933333+00:00

Dear Microsoft 365 Support,

All users in our organization are unable to log in to Outlook on the web (outlook.office.com). The page shows “HTTP ERROR 500” in every browser, including Incognito mode. issue started today, 13 November 2026.

This is affecting our daily business work. Please let us know:

  1. The cause of the issue
  2. The expected time of resolution

Kindly keep us updated until it is fixed.

Microsoft 365 and Office | Subscription, account, billing | For business | Other
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  1. Deleted

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  2. Marcin Policht 112.8K Reputation points MVP Volunteer Moderator
    2026-11-13T12:10:22.27+00:00

    Unfortunately this is still the ongoing recovery.

    You can monitor the latest updates via https://status.cloud.microsoft/

    Here is the latest available information:

    User impact: Users may be unable to access or perform several actions in Microsoft 365 services.

    Current status: Our recovery efforts to restore service health throughout the affected environment is progressing. In parallel, we're continuing to pursue multiple workstreams to pinpoint the source of the issue and ensure the recovery of the affected environment. This issue impacts Outlook.com, OneDrive, OneNote, Microsoft To Do, Teams, and Microsoft 365 for the web although you may also see issues in other Microsoft 365 services.

    Next update by: Friday, November 13, 2026, at 2:30 PM UTC

    If the above response helps answer your question, remember to "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

    hth

    Marcin

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