I get the message:
"We couldn't log on to the incoming (IMAP) server. Please check you email address and password and try again."
I CAN login to gmail with chrome. I swapped out the motherboard and CPU yesterday and had to revalidate Office. As far as I know Office continued to work the rest of the day. The issue started happening last night. It does look like Windows installed two updates last night:
I have not tried to roll those back yet.