Avast blocks Microsoft Teams (worked well for a long time before) as IDP.HEUR.23
You can report a suspected FP (File/Website) here: https://www.avast.com/false-positive-file-form.php
How can i report it on website, if file was moved to quarantine?
i reported it with an internal button in quarantine.
Well, you could have extracted it, but this should work as well.