Using classic Outlook for Windows in business environments
Obviously the company Microsoft doesn't care. Either they're forcing it on you due to the typical arrogance of tech companies who think the know best, or due to the pig ignorance of nerds who work in tech who are completely out of touch with normal people.
(One day, a miracle will occur. Some geek will actually reach out to a non-tech person and say "hey, we're about to roll something out, any chance you could check it out and let us know what you think - because we're geeks and have no clue what normal people are like")
The only solution is to select all your Outlook emails and export them to the cloud and then go sign up for Gmail.
I guarantee, if a thousand people a day started doing that the village idiots at Microsoft would backtrack immediately.
It's happened to tech companies before. You just need enough of us to do it.
By by outlook. I'm off to Gmail.