OSX ADDRESS BOOK & EXCHANGE

Hi I'm trying to get the built-in OSX 10.2 address book to work with MS exchange so it can grab the addresses from the server using AD. I can get MS Entourage X to work if I setup the Directory Services and change the port number to 3268. I have tried with a NT 4 server and a windows 2000 server both times Entourage works but not the built-in Address book. Does anyone have any ideas?