The Address Book service enables users to store contacts on the server and to access those contacts with multiple computers and devices. The following applications in OS X are compatible with the Address Book service:
• Address Book
You can enable the Address Book service to provide LDAP searches of the directory servers that your Lion Server is bound to, so your users do not have to configure their Address Book preferences to include various LDAP servers.
The Address Book service uses open source technologies including CardDAV (an extension to WebDAV), HTTP, and HTTPS, as well as vCard (a file format for contact information). You must use Open Directory user accounts to access the Address ...