[Tadrill] How to Hide the Built-in Report Button in Outlook

Question

I want to unify the suspicious email reporting flow to Tadrill Alert (Report Add-on), so I would like to hide the built-in [Report] button in Microsoft 365 Outlook. 

Answer

The following steps allow the admin to configure this in bulk.

1. Access the following page with a Microsoft 365 admin account.
   https://security.microsoft.com/securitysettings (Microsoft Defender - System - Settings)
2. Click on [Email & Collaboration].
3. Click on [User Reported Settings].
4. Select [Use a non-Microsoft add-in button].
5. Enter any contact in [Add the destination Exchange Online mailbox for reported messages:].
6. Click [Save] to save the settings.

※It may take a few hours to reflect.
※Email items reported using Tadrill Alert (Report Add-on) will not be forwarded to the mailbox of the contact entered in step 5.