I really have never heard of on prem 365 deployments, I think any confidentiality is handled via contracted promises with legal ramifications for breaking. With Azure GovCloud for instance there’s no encryption / user key custody on the one drive side, everything you do is uploaded to Microsoft and they maintain keys, they just hire people who passed a background check to run the infrastructure, US nationals only etc

There is virtually no consequences or accountability when big-tech companies share private data. For crying out loud, they were caught red handed sharing private data from their EU endeavors.

If even sovereign states with clear laws forbidding such behavior can't keep those companies in check, no enterprise/b2b can.

How do I decline it?? I keep clicking no, hide, not interested, cancel, etc. but it keeps showing up and activating...if I had a nickel for every time I clicked it on accident in Azure because a layout shift moved it under my mouse when trying to press a button I would have a lot of nickels. It even showed up as an app on my phone because I guess the Office 365 entry got hijacked...