Users may have been unable to access SharePoint Online sites
ID: SP1187163
Issue type: Incident
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Impacted services
SharePoint Online
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Details
Title: Users may have been unable to access SharePoint Online sites
User impact: Users may have been unable to access SharePoint Online sites.
Final status: We identified that a section of SharePoint Online infrastructure was performing below acceptable performance thresholds and resulting in impact. We redirected user traffic to alternate infrastructure in attempt to restore the service. We’ve confirmed, after a period of monitoring service telemetry, that the issue is mitigated.
Scope of impact: All users trying to access SharePoint Online sites that are served by the affected infrastructure in Tokyo may have been impacted.
Start time: Monday, November 17, 2025, at 1:54 PM UTC
End time: Monday, November 17, 2025, at 2:11 PM UTC
Root cause: A section of SharePoint Online infrastructure was performing below acceptable performance thresholds, resulting in impact.
Next steps:
- We'll continue to closely monitor the affected environment to ensure the service remains healthy, and we'll review our service resilience processes to help us reduce or avoid similar issues in the future.
This is the final update for the event.
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