1. 
   1. Click the ^ arrow in the bottom right of your screen.

2. 
   1. Right click the teams icon
   2. Left click quit teams

Common Issues that Exiting teams and reopening can fix:
 

1. Dialpad Missing
2. Not Receiving Messages (Also could be internet related)
3. Not Able to Send Messages (Also could be internet related)
4. Status Unknown or Cannot Change Status