Addressing using Outlook 2000 Contact

We had problems synchronizing a remote users’ mailbox so we had to create a new profile to manage it. The user writes: When I go to address an e-mail to some one outside I drop down to contacts. When I do that now, all the contacts are listed FirstName first instead of last name first, the way they used to be. Do you know how to change this? I did it once before, but have long since forgotten how.
Like this user, I can’t find it either and I know it is there! He is not referring to the File As in an individual contact. I’ve gone to Tools, Options, Contacts and looked; advanced email options and looked; Tools, Services, and looked at addressing for the Exchange server. Does anyone have