Microsoft Teams was down and experiencing an outage worldwide for many users for more than two hours today. The issues started at around 6:30AM this morning, and were blocking connectivity for lots of Microsoft Teams users across Europe and Asia. Microsoft says it has identified the root cause for the issues and has put a fix in place. “We’re seeing signs of recovery and will continue to monitor the service.”
The connectivity issues were affecting users globally, with some Microsoft Teams users reporting 401 error codes when attempting to access the service via the web. Others were able to see Teams and channels but were unable to send messages. Microsoft also warned that some users “may experience degraded performance with multiple features” and that “any user could be affected by this issue.”
We’ve identified the root cause and performed mitigation actions. We’re seeing signs of recovery and will continue to monitor the service. Users still experiencing impact should restart their clients to expedite recovery. Further details can be found under TM252802.— Microsoft 365 Status (@MSFT365Status) April 27, 2021
This is the second Microsoft Teams outage this month, following issues with the service at the beginning of April. Microsoft also experienced Teams problems for more than four hours last month, after an authentication change knocked out access to the communications app. Azure Active Directory also experienced issues as part of last month’s outage, alongside Office web apps, Exchange Online, SharePoint Online, and other Microsoft services.
It appears Microsoft’s service issues are limited to Teams this morning, with no other signs of Azure, Xbox Live, Office, or other services experiencing issues.
Update, April 27th 8:40AM ET: Article updated with fix details from Microsoft.