Jason wrote:

He has several folders set to be shown in Outlook Address Book.
When I said primary address book, I mean that it searches only the
first contact list lin the OAB.

Outlook will search as many contacts folders as you have that have been
enabled as address books. It will stop searching o the first match,
however.

I have tried removing the OAB service and recreating it.

And what was the outcome?
--
Brian Tillman