Microsoft Teams is facing downtime for several thousand users around the world. Users reported that they are unable to access Microsoft Teams or leverage any features.
Microsoft investigated the issue and has already found the cause of this issue. Microsoft revealed that a recent deployment contained a broken connection to an internal storage service, which has resulted in impact. Microsoft is now working to redirect traffic to a healthy service to mitigate the impact.
Microsoft Teams admins can find additional info in the admin center under TM402718.