Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services
ID: MO1221364
Issue type: Incident
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Status
Service Degradation
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Impacted services
Microsoft 365 suite, Exchange Online, Microsoft Defender XDR, Microsoft Purview
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Details
Title: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services
User impact: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.
More info: More info: Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.
Some of the impacted service functions include, but may not be limited to:
- Sending and receiving email through Exchange Online, including notification emails from Microsoft Viva Engage.
- Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.
Current status: We've identified a portion of dependent service infrastructure in the North America region that is not processing traffic as expected. This is impacting our load balancing processes and general service availability. We're working to restore this infrastructure to a heathy state and rebalance the service traffic to achieve recovery.
Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.
Next update by: Thursday, January 22, 2026, at 10:00 PM UTC
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