I’m working in an office that’s looking to compile all the contacts from our clients’ Address Books onto a central server. Specifically, we would like to be able to create and edit new contacts locally. I believe that it’s possible to connect Address Book.app to the server with LDAP, but that I would be unable to edit contact info from within the client. In Address Book’s preferences, I see the option to "synchronize with Exchange" – does OS X server supply the protocol to take advantage of this functionality? or is there a UNIX service that I can install to take care of this?