Using classic Outlook for Windows in business environments
Same here. Apparently Microsoft has made things so complicated that they're loosing control. Email is about the oldest use case for the internet and even that is becomming totally unusable.
Switching back to the old mail app is no solution, windows will switch back to new outlook in a few days, and the old mail app will be discarded of this year.
My solution, or rather workaround, for now is simply not using the app. The web version is working (untill now), and i will get the notifications on my phone. At least the Android mail clients are working properly...