Some users may be unable to access Office.com or Microsoft 365 Copilot web page Monday 16th March 2026 10:52:07


Some users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page. Microsoft has identified that a section of their cloud service infrastructure is not processing traffic efficiently and are making configuration changes to remediate impact.

Affected services: Microsoft 365 Copilot Chat, Microsoft 365 suite, Microsoft Copilot (Microsoft 365)

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

Scope of impact Impact is specific to some users who are served through the affected cloud infrastructure.