Scroll up you will see a link in a previous email.
I will put it here, hopefully it will work
https://www.alitajran.com/fix-winmail-dat-attachment-in-office-365/#h-how-to-fix-winmail-dat-attachm...
I followed the instructions there and it fixed our long standing problem. I got no help from QB about this, they counseled me to wait for an update.
Its also an extremely obscure setting...but follow it exactly, should fix your problem. Good luck!
