No matter what you use your Mac for, there may come a time when Command + Q just doesn't cut it. For closing out those persistently frozen apps that just won't go away, there are a couple of ways to get the job done.
You can first try restarting your Mac and see if your Teams app is working again. If not, you can continue with the fixes we have gathered for you. Furthermore, you can also try restarting your router if you’re experiencing a bad internet connection.