If you were invited to a Teams meeting, or left early, and don't want to see the Chat from the meeting.
- Go to "Chat", select the chat stream,
- Click the ellipsis at the right of the chat name,
- Select "Mute"
This method can work for any chat... If you are in the middle of something and don't want the pop-ups, you can mute the chat until you are ready to read the chat.
Another way to turn off Meeting Chat
- Click on the ellipsis next to your picture/initials
- click on Settings
- Click Notifications
- Under Meeting chat notification, select Mute