Microsoft 365 Degraded Performance

Update timeline

1. investigating Sep 01, 2026, 06:08 PM UTC

   Microsoft is investigating an issue affecting multiple Microsoft 365 services. Users may experience intermittent issues with Outlook, Microsoft Teams, OneDrive for Business, SharePoint Online and Copilot. Issues may include difficulty accessing or searching email, delays sending or receiving messages in Outlook, problems with Teams calendar and search, and issues accessing, searching or syncing files in OneDrive and SharePoint. Some Copilot prompts that rely on organizational data may also fail. Microsoft has reported continued recovery and is working to fully restore affected services. The Division of Information Technology is monitoring the incident and will provide updates as more information becomes available.

2. monitoring Sep 02, 2026, 01:46 PM UTC

   Microsoft has implemented fixes and reports that service availability remains above 99 percent, with the majority of users no longer experiencing issues. However, some users may continue to experience intermittent issues with Outlook, OneDrive for Business, SharePoint Online and Microsoft 365 Copilot. Microsoft continues to monitor service recovery and address any remaining impact. The Division of Information Technology will provide additional updates as more information becomes available.

3. monitoring Sep 02, 2026, 07:28 PM UTC

   Microsoft reports that the majority of affected Microsoft 365 services have been restored. Issues affecting OneDrive for Business and SharePoint Online have been resolved. Some users may continue to experience issues with Outlook, including difficulty signing in to Outlook on the web or downloading email attachments. Microsoft is continuing to address the remaining impact. The Division of Information Technology will provide additional updates as more information becomes available.

4. monitoring Sep 03, 2026, 02:36 AM UTC

   Microsoft reports sustained recovery across affected Microsoft 365 services, with most users no longer experiencing issues. Some users may continue to experience difficulty signing in to Outlook on the web or downloading email attachments. Microsoft is continuing mitigation efforts to address the remaining issues and restore service for all users. The Division of Information Technology will provide additional updates as more information becomes available.

5. monitoring Sep 03, 2026, 02:41 PM UTC

   Microsoft reports that previously identified issues affecting Microsoft 365 services have been resolved, with remaining impact limited to Outlook on the web. A small number of users may continue to experience issues accessing Outlook on the web or with email functionality. Microsoft is taking additional steps to address the remaining issues and restore normal service. The Division of Information Technology will provide additional updates as more information becomes available.

6. monitoring Sep 03, 2026, 05:58 PM UTC

   Microsoft reports that the majority of previously identified Microsoft 365 issues have been resolved. However, users may continue to experience issues with Outlook on the web, Outlook mobile apps and Outlook for Mac. Microsoft is continuing mitigation efforts to address the remaining impact and restore normal service. The Division of Information Technology will provide additional updates as more information becomes available.

7. resolved Sep 03, 2026, 07:55 PM UTC

   This incident has been resolved.