MO1220495: Microsoft 365 suite Service Health Incident (Service Degradation)

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365 Service Alert

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Jan 21, 2026, 12:45:52 PM (yesterday) Jan 21
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Users may be unable to access Microsoft 365 services.                                                                                                                                                                                                                                                       
Microsoft

Users may be unable to access Microsoft 365 services

ID: MO1220495

Issue type: Incident

Status

Service Degradation

Impacted services

Microsoft 365 suite, Exchange Online, Microsoft Teams

Details

Title: Users may be unable to access Microsoft 365 services

User impact: Users may be unable to access Microsoft 365 services, including Teams and Outlook.

Current status: Our investigation so far indicates impact is associated with a possible third-party networking issue. We're recursively investigating the health of the Microsoft-managed service environment to identify whether any mitigation actions are required and ensure our services are healthy.

Scope of impact: Your organization is affected by this event, and any of your users hosted in North America may be impacted.

Next update by: Wednesday, January 21, 2026, at 7:00 PM UTC

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