Problem: You attempt to sign into Teams but are stuck in a loop of entering your correct information, and a window coming back like this:
Solution:
In the system tray (area in the lower-left corner of the screen, where your clock and system tray icons are), right-click on the Teams icon:
If you don't see the Teams icon, you may need to click the carat to show all icons:
Now click on Sign Out. You should be able to go back into Teams at this point and sign in.
If you're still having trouble, give the HelpDesk a call at x4000.