Chat bubbles in Teams meetings are another way to surface information. Using chat bubbles is a personal choice and it doesn’t replace the regular chat window. Microsoft says that chat bubbles make chat more central to a conversation, but it really depends on the type of meeting, the topic being discussed, and the number of participants. In any case, chat bubbles are there to be used if you want to.
Participants in Teams meetings can use the meeting chat to discuss topics, post pointers, and so on. The access rules are changing for some added to a meeting to make sure that people don’t get too much access to meeting resources (like chat) once the meeting finishes. It’s a small but important point for Teams administrators to understand.
You can disable Chat for Teams users, but is this a good idea? Chat is an integral part of Teams and disabling it seems like a bad idea for many reasons, not least being compliance as all you’ll do is drive users to find another way to communicate – like WhatsApp.