As a cautionary tale I did as directed, but upon relaunching Teams, I ran into the dreaded "Teams App is Stuck on 'Loading' on Mac" bug. Gah! Spent hours last night removing files, deleting/reinstalling apps, signing out of everything. Nothing helped. This morning I took another run at it, and found the thread below - buried in there is a trick to both remove all keychain items (and support files) and then LOG IN AS A DIFFERENT USER - after which you sign out and sign in again as yourself. That finally worked. If anyone else comes across this, delete the files in Application Support with caution, as something gets badly whacked related to identity tokens and such, and you may not be able to access Teams again without major surgery.
On the bright side, it honors the Teams order now :-)