IMPORTANT UPDATE…. July 16th 2020
Office put out a patch yesterday evening that fixed the problem. You may need to update your Office via Word/Excel to get it.
There is a major problem with a update that is only effecting Business class licensing where Outlook will open and close after 1-2 seconds.
To fix this they need to be manual downgraded to a earlier version below is how to do so.
The following are 2 separate command lines to run on their machine to swap it to a working version.
cd \Program Files\Common Files\microsoft shared\ClickToRun
officec2rclient.exe /update user updatetoversion=16.0.12827.20470