Well, you are correct. The login name and password that she was using is tied to the domain.

The IT people should have a utility (ERD Commander) to change the Admin password if they forgot it(I know we have one at work).

They should back up the profile BEFORE they readd it to the domain just in case the readdition to the domain and relogin overrides the stored profile.

Unfortunately without a local admin account to login to there is nothing that you can do unless you have the password chaning utility which would allow you to logon as Administrator and backup her data.