I can't get Exchange working on MacOS Sierra to save my life. Has anyone successfully connected Exchange via Mail.app or iCal. Apple didn't indicate this was broken in the release notes which I found odd.
Mine was being strange this morning. The exchange accounts I had in there already stopped working. So I deleted them, but then it wouldn't let me re-add them. A reboot fixed it for me.
Something definitely has changed with the Exchange support. Up until a while ago, I forget which big cat version it was, the exchange server that I use worked, and stopped. With MacOS Sierra, it now works again.
No. I read a post to try logging in with the shared email address but your own credentials. When trying it gives an error "This account already exists".