So after an uninstall and reinstall the functionality has returned. I had to turn the toast notifications back on, but it works. Good luck all.
Just confirmed. Complete Office uninstall, reboot and reinstall resolved the issue for me.
To others, you may not need to uninstall/reinstall if you do what I did. Posted a few posts back.
with outlook opened
go to notifications & actions in windows 10, turn off outlook notifications.
now turn outlook notifications back on.
Closed outlook
opened outlook
went to file/options/mail in outlook
I unchecked "display a desktop"
recheck "display a desktop"
sent myself a test email, the notification popped up with a sound, I clicked on it, the email popped up........
Can anybody else try this and verify if it worked for them?
Your solution did not work for me. But a full uninstall did.