The Administration Server provides access to your application data about user accounts, group lists, access privileges, organization units, and other user- and group-specific information.
User and group information is stored either in flat files in a text format or in a directory server such as Sun Java System Directory Server, which supports Lightweight Directory Access Protocol (LDAP). LDAP is an open directory access protocol that runs over TCP/IP and is scalable to a global size and millions of entries.