To create breakout rooms, you must be a meeting organizer or a presenter in the meeting organizer's organization who's been appointed a breakout rooms manager. For more details about how to create breakout room, you could refer to:https://support.microsoft.com/en-us/office/manage-breakout-rooms-in-microsoft-teams-7de1f48a-da07-466c-a5ab-4ebace28e461#bkmk_create-breakout-rooms
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