Any luck with trashing preferences? She might like to trash Entourage.plist and the whole Microsoft folder in the user>library>preferences. How about another account?
An easier way to see if the prefs are corrupted could be to add a new account in Entourage with a new name, configure it the same way as the old one and see if it works. If no, check the prefs, if yes, delete the old one.
Tell us how it goes.


Alex
3.1 GHz 13" MacBook Pro 2015, 8 GB RAM, OS 10.11.2, Office 2011, TimeWarner Cable
2.8 GHz Xeon Mac Pro 2010, 16 GB RAM, OS 10.11.2, Office 2011, LAN