Split from this thread.
My updated to latest version Excel is part of my Office 365 Business suite. I am being asked to sign in. When I try the sign in fails using my correct credentials.
The request to sign in only seems to happen when I try to open a Onedrive file (same account). Here is the message I see:
I have cleared my credentials, restarted dozens of times, to no avail.
When I enter my password it says something like contacting server and never stops. I finally close Excel with Task Manager.
Thanks for your help.