CCAC ITS Department

4 ongoing outages

Some users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page

Warn

Microsoft 365 suite

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 impact to Office.com is still occurring, but the impact to Microsoft 365 Copilot web clients, office.com/chat, m365.cloud.microsoft, m365.cloud.microsoft/chat and copilot.cloud.microsoft, have recovered as of March 17, 2026, at 4:05 PM UTC. 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: While our telemetry indicates that the impact is largely remediated, we’re continuing to monitor the environment as our traffic optimizations are nearing completion. We're proceeding with the monitoring process to ensure the service is stable and to determine whether any additional mitigative steps may be necessary to fully resolve this issue. Scope of impact: Impact is specific to some users who are served through the affected infrastructure. Start time: Tuesday, March 17, 2026, at 11:42 AM UTC Root cause: The infrastructure that supports access to Office.com and the Microsoft 365 Copilot web sign-in page is receiving a high volume of traffic that inhibits the rate at which some users' requests are being processed, preventing some users from accessing the service pages. Next update by: Wednesday, March 18, 2026, at 3:00 PM UTC

Last update on Mar 18, 2026 3:34 AM