We’ve had a few people with Teams troubles similar to what you describe. Interestingly all on Windows 10, but I’m not sure that’s a meaningful datapoint or not.
Reinstalling from scratch has gotten all of them running again: https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/download-app
It sometimes takes a couple of Teams starts to get back up and running. Teams appears to have some sort of “self-healing” routines that it runs.
A user said his Teams “died” and won’t let him log in and gives the following error: /adfs/services/trust/13/windowstransport
He tried a reboot and that didn’t change anything. Any ideas?
Naima T. Dennis
Sr. Assistant Registrar for Technology
Office of the Registrar | The University of Vermont
85 So. Prospect St. Burlington, VT 05405| 360 Waterman
802-656-1390 | www.uvm.edu/registrar