Using older versions of Outlook for Mac in business environments
Sorry to hear that.
All of my machines are working without any problems now. I have been looking for a solution that works for me for more than a year - as this problem plagued me from 2011 and is the reason I went to 365, which worked great, for a while...
I wish I could offer some advice, but being a Windows deserter, my Mac knowledge is at 101.
Hope you find a solution and wish me luck that this fix sticks past the two days it has been running.