Issues accessing Microsoft 365 services 12th Jan 2021

Users may have experienced access issues when using one or more Microsoft 365 services. Specifically SharePoint Online and Microsoft Teams users in Europe; though, users may have also experienced similar issues with Exchange Online, OneDrive for Business.

Impact was primarily to users located in the United Kingdom; however, users in other regions who were routed through the affected United Kingdom-based infrastructure may have also been impacted.

Start time: Tuesday, January 12, 2021, 3:51 PM (3:51 PM UTC)

End time: Tuesday, January 12, 2021, 4:40 PM (4:40 PM UTC)

Preliminary root cause: Processing infrastructure that handles Microsoft 365 request traffic for European users began experiencing failures, preventing some users from accessing the services.