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 2 months 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
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Latest Updates ( sorted recent to last )
2 months 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
2 months 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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