Exchange Alias???

I have a windows 2003 network. AD installed, Exchange 2003 along with Outlook 2003. One account is giving me trouble.

While in Outlook, I open a new email, start to type her name in the “to” field, and outlook tries to help, bringing up her name below, saving me the time to type all of it in. Great! One problem, it has her name right, but the alias after it is incorrect, its of a women that had her position before her. (name )

(While typing her name into the “to” box of a new mail message):
It appears: name in the box below.

Should be Name in the box below.

Not sure where to locate this! I have looked through AD and in her exchange information, but no luck. Thanks in advance!