Do you mean to create a live event in a Teams calendar?
You can create a live event directly in Teams Calendar. If you want to create a live event, you need to have the following things. Your IT admin can provide more information.
- A Office 365 Enterprise E1, E3, or E5 license or a Office 365 A3 or A5 license.
- Permission to create live events in Microsoft Teams admin center.
- Permission to create live events in Microsoft Stream (for events produced using an external broadcasting app or device).
- Full team membership in the org (can’t be a guest or from another org).
- Private meeting scheduling, screensharing, and IP video sharing, turned on in Team meeting policy.
For more details about scheduling a Teams live event, you could refer to: https://support.microsoft.com/en-us/office/schedule-a-teams-live-event-7a9ce97c-e1cd-470f-acaf-e6dfc179a0e2
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