Hi FollandJanet-1358,
You can End the Teams meetings early by configure in File > Options > Calendar > Calendar Options.
Moreover, you can change the registry at HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\Calendar. It will update both EndEarlyShort and EndEarlyLong values as well as the EndEventsEarly key. You can set the value as you want.
For more details, please refer to this article:
https://c7solutions.com/2019/04/save-time-have-all-your-meetings-end-early.
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