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The meeting organizer (or a presenter with permission) can end a Microsoft Teams meeting for all participants, instead of just leaving the meeting.
To end a meeting for everyone:
1. During the meeting, select More options (three dots) from the meeting controls.
2. Select End meeting.
3. Select End to confirm.
When the meeting ends, all participants are disconnected from the meeting.
For additional details, see the Microsoft support article: End a meeting in Microsoft Teams.