My wife and I share a notebook but I have been unable to get Outlook to
download/upload mail within her user account. When testing the
settings, it would always indicate that the pop-server name was invalid
or could not be found. All settings were always correct. My account, in
which mail was set up first, has always worked.

The solution turned out to be establishing a new profile within her
user account. As soon as I set up a profile with a name other than
Outlook, the settings test worked fine and mail is now being sent and
received.

What I don't understand is why that fixed the problem. While I am glad
it is behind us, I would appreciate any insight as to why that
corrected the problem.