Using Classic Outlook on Windows for personal email, calendar, and contact management
You can do the following, it worked for me. It's a temp. fix.
I copied it from a post from user: ElissaMaxine Karpf
you can Run Commmand with Run as administrator
And paste this on command Prompt it will work.
“C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe” /update user updatetoversion=16.0.17029.20108
Is this supposed to take a VERY long time? I've had the "Downloading Microsoft 365 and Office Updates" screen loading for at least 20 minutes.