How to Disable The Microsoft Report Button in Outlook
This technical article provides a step-by-step guide for administrators to remove Microsoft's built-in email reporter button.
Remove Outlook's Built-in Report Button
Remove Microsoft's Report Message Add-in
Remove Outlook's Built-in Report Button
To remove the built-in report button in Outlook, navigate to Microsoft Defender > Settings > Email & collaboration > User reported settings (or click this link).
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Uncheck the box next to Monitor reported messages in Outlook and Monitor reported messages in Microsoft Teams
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Select Use the built-in Reporter button in Outlook
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Click Save
Remove Microsoft's Report Message Add-in
To remove Microsoft's Report Message add-in, navigate to the Microsoft 365 Admin Center > Settings > Integrated apps. If the Report Message add-in is present, open the add-in and click Remove app.