Teams HTTP error 401

Question

Hello,

I use the online version of Teams. I usually log in via portal.office.com and then choose the Teams app. 

Now I can't reach Teams at all. I can log in to portal.office.com, Outlook, OneDrive, Word, etc. is normally working, but after clicking "Teams" it shows a blank page with "HTTP error 401".

It is the same with other browsers and on another computers, too. But on my mobile Teams works fine.

Can you help me with this?

It is urgent, I MUST use Teams to work online, so it I need to have it fixed quickly.

Answer 1

Try restarting your Teams Client.

Via Microsoft 365 Status on Twitter:
https://twitter.com/MSFT365Status/status/138699...

We’re investigating an issue with Microsoft Teams impacting Europe and Asia. For more details please follow TM252802 in the admin center.We’ve confirmed that this issue affects users globally. We’re reviewing monitoring telemetry and recent changes to isolate the source of the issue. More information can be found under TM252802 in the admin center.

Update 5:24 AM PTWe’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.

Answer 2

Thank you for the information. 

Now it works.

Answer 3

I have the same problem! It's the first time this happened to me. Teams was working fine in the morning, it's only now that I can't open it

Answer 4

Hi,

Teams is down right now worldwide. I'll update you when it is back up. Appreciate your patience