The most common feedback we are getting from clients is that the Hacware report button in Outlook/ Outlook Web is different to the M365 'Report Message' button as detailed here:

Our clients only want one button to report emails, which makes sense - they should not have to guess if an email is a real phishing email and report to M365 (and integrated anti-spam), or if it is a simulated phishing email and therefore choose the Hacware report button. At the end of the day, we (the provider) end up getting tickets asking if the email is ok, or what report button they should select.

Can you please enable the ability to use the M365 report button - clients are already using this button to report emails, the button integrates with services like Avanan, and it will help to avoid a lot of confusion.