Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Luke
Yes, I am Windows , but there are also MacOS instructions too!
In any of 365 excel, oneNote, powerpoint or word (don't use outlook, there are complications!) from your menu, select preferences then privacy and turn off the offending experiences there:
i.e.: follow this link: Copilot in Microsoft 365 apps for home: Your data and privacy you'll land on the article I've screenshot the relevant part of below:
Click on the privacy settings link I've highlighted (above) and you'll find your Mac option:
I really hope that helps? !!
It should not be this hard to opt out!!