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Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client.
The steps to uninstall Microsoft 365 depend on the type of installation you have. Follow the steps in this article to uninstall: Uninstall Office from a PC.
You may also try to run the Scan by using Microsoft Support and Recovery Assistant - Outlook | Microsoft Docs to scan Outlook for any errors before uninstalling.
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