You'll know a team meeting is happening in a channel when you see an invitation to join.
It will provide a preview of any content shown and who's in the meeting. If the meeting is scrolled out of view in the conversation, you'll get a notification in the channel.
There are three ways to join meetings in Teams:
You can join from a message within a conversation:
If you're working in another channel and your messages aren't currently in view, you can join a meeting from a notification that appears in the top right corner of your screen.
Or, if you're busy in a chat, you'll receive a notification that you've been invited to a meeting, and you can join from there.
Both before and during the meeting, you'll see the meeting notice in your chat list or a channel conversation. The Meet now button also appears near the channel name in Teams.
You can join from the Meetings calendar or from a meeting notice in a channel or chat.