Some users may be unable to access the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign‑in page
ID: MO1268972
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 the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign‑in page
User impact: Users may be unable to access the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign‑in page.
More info: 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 Office.com.
Current status: We've identified that a section of service infrastructure is not processing traffic efficiently. We're making configuration changes to remediate impact.
Scope of impact: Impact is specific to some users who are served through the affected infrastructure.
Root cause: The infrastructure that supports access to the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign-in page is not processing traffic efficiently, preventing some users from accessing the service pages.
Next update by: Friday, April 3, 2026, at 12:30 AM UTC
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