Report Phishing button error for Outlook

• The Report Message and Report Phishing add-ins work with most Microsoft 365 subscriptions and the following products:

  • Outlook on the web
  • Outlook 2013 SP1 or later
  • Outlook 2016 for Mac
  • Outlook included with Microsoft 365 apps for Enterprise
  • Outlook for iOS and Android

• Currently, reporting messages in shared mailboxes or other mailboxes by a delegate using the add-ins isn't supported. Messages aren't sent to the reporting mailbox or to Microsoft. Built-in reporting in Outlook on the web in shared mailboxes or other mailboxes by a delegate is supported. Messages are sent to the reporting mailbox or to Microsoft.

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/submissions-users-report-message-add-in-configure?view=o365-worldwide#get-the-report-message-add-in-for-yourself