Outage in Microsoft 365

Some users may be unable to access their Exchange Online mailboxes through Outlook on the web

Resolved Minor
November 12, 2025 - Started about 2 hours ago - Lasted about 2 hours

Incident Report

Title: Potential issues accessing mailboxes via one or more connection methods User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods. Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.
Components affected
Exchange Online

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Latest Updates ( sorted recent to last )
about 2 hours ago - at 11/12/2025 05:33PM

Title: Some users may be unable to access their Exchange Online mailboxes through Outlook on the web

User impact: Users may be unable to access their Exchange Online mailboxes through Outlook on the web.

Current status: We're reviewing service logs to identify the root cause of this event, so we can determine our next troubleshooting steps.

Scope of impact: Some users hosted in the Europe, Middle East or Africa regions attempting to access their Exchange Online mailboxes through Outlook on the web are impacted.

Next update by: Wednesday, November 12, 2025, at 7:00 PM UTC

about 2 hours ago - at 11/12/2025 05:14PM

Title: Potential issues accessing mailboxes via one or more connection methods

User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods.

Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.

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