Some users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page
ID: MO1254319
Issue type: Incident
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Status
Service Degradation
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Impacted services
Microsoft 365 suite
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Details
Title: Some users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page
User impact: Users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page.
More info: The impacted web-client is office.com, and impacted Microsoft 365 Copilot web-clients are office.com/chat, m365.cloud.microsoft, m365.cloud.microsoft/chat and copilot.cloud.microsoft.
Users can access Microsoft Copilot through application-based Microsoft Copilot services. This includes, but is not limited to:
- Microsoft Copilot desktop app
- Copilot in Microsoft Teams
- Copilot in Office apps
User may be able to leverage https://m365.cloud.microsoft/search, and should be able to sign in using this page. Once signed in, users can access the impacted web-based office.com and Copilot clients.
Current status: We've identified that impact associated with MO1253428 has started to reoccur. We're reviewing traffic pattern telemetry and applying configuration changes to optimize connections and remediate impact.
Scope of impact: Impact is specific to some users who are served through the affected infrastructure.
Next update by: Tuesday, March 17, 2026, at 4:00 PM UTC
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