MS Teams is locked onto an old organisation. You want to switch to a new one. What to do?
All you can find by searching are some irrelevant "answers" by "contributors" on Microsoft forums. You are pulling your hair out.
1 Answer
On Ubuntu 18.04:
sudo apt purge teams rm -rf ~/.config/Microsoft/Microsoft\ Teams/ rm -rf ~/.config/Microsoft\ Teams\ -\ Preview/ sudo apt install teams 
