Please do as following: Shift to the Calendar view, and double click the meeting to open it. Click the Respond > Reply All on the Meeting tab. See screen shot: Then a replying email is created with subject and recipients of all meeting attendees. Compose this replying email and Click the Send button.What is Microsoft Teams meeting?
A Channel Meeting is a meeting that occurs within a channel in a team in Microsoft Teams and is out in the open, visible (and open) for anyone that is a member of the team to join (it's "public"). For example, this can be a recurring team status meeting.