thank you @Marcin Wielgus for sharing your feedback on Teams for Linux. It seems that it would require some further investigation. If you would open a support request from https://admin.microsoft.com, our support team can work with you over phone/email to get more information on this issue.
xfce4 - teams make whole wm unresponsive

When playing around with screen sharing and calls:
* during the call audio works
* i can see others sharing screen
* when i share the screen keyboard stops working (everywhere, teams included)
* everything starts lagging
* after a few moments window manager stops to respond to mouse clicks
* Only thing i can do is reboot...X11 does not respond to ctrlaltbackspace:/
* I'm unable to gather any more diagnostics
But: audio quality is good, screen shared by others is super crisp, installation went flawlessly (MX linux 18.3), cpu usage seems to be lower than on firefox.
Anyway great job guys, at this point it is already better thing than teams in firefox. thank you very much for making teams linux client a thing.