Hi @KB
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What is the version of your Outlook? It is recommended that you please check the Outlook client version (File>Office Account>Product Information) and try to upgrade to the latest version to see if the problem persists.
In addition, it is suggested that please open the Outlook in safe mode (Hold the Ctrl key while starting Outlook) to see if the issue persists, if not, considering the issue may related to the Teams Meeting add-in for outlook, please refer to the article to troubleshoot: Resolve issues with Teams Meeting add-in for Outlook - Microsoft Teams | Microsoft Learn
Meanwhile, i found a similar thread approved by most people, please feel free to refer to it.
Hope it helps!
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