To me that is all just unreasonable expectations in the first place. None of the reasons people want that kind of control and knowledge are valid excuses for the overreach. It's just something they want just like the countless things anyone wants.
All across the board MS picks the wrong people to say 'No, tough shit, gtf over yourself." to. They say it to normal users who want to do reasonable things, instead of to business owners and managers who want powers they have no moral right to.
It's fundamentally impossible to control information after it is communicated, no matter what technical gimmicks you concoct, and so it's invalid to even try in the first place. It's barking up the wrong tree and only harming the innocent and not even hindering the criminal.
If something is that precious then keep it in an airgapped lab and frisk people for cell phones at the door, and get nothing much done with that data that's so inconvenient to access.
If you need other people to access the info, then get over yourself and simply have people sign standard legal agreements. If the recipient gets hacked or something then they get hacked. That will still happen regardless. The annoying special access didn't change anything. A hacked client machine can siphon that same data.
MS just doesn't ever say "get over yourself" to the right people. They say it to you & me but treat the most offensive ideas from buisiness owners as very serious and valid needs.
It's made them a lot of money so it's not changing of course. I don't mean to pretend that there is any way or any remotest hope to change that. Only to point out how it's fundamentally wrong, and one of the reasons to simply try to avoid using any of their products and services as much as you can manage.
Goes all the way back to read receipts. The knowledge of when exactly I viewed a correspondence is obviously useful to a sender, but that usefulness does not make it something they have any right to, no matter what the excuse or rationalization is, no matter how much you try to invoke important sounding things that the message might have been about or how important sounding the consequenses like if a court case hinged on proving that you received a message or something. Not only does no one have the right to that knowledge, the mechanism doesn't even prove what it claims to prove anyway. A read receipt still does not prove that I read a message, only that an email client performed the transaction. If you really need an ack for a message, then you have the recipient, the person, send an ack, as in send another message back. Or send the message via a process server. If it's not important enough to justify a process server, then it's just not that critical and you should just get over yourself and accept that the recipient will get to it when they get to it, and you will survive not having this bit of control and visibility into someone else's life.