Directory Access is a utility in the Utilities folder inside the Mac OS X Applications folder which allows you to set up connections that provide authentication, contact and other information.

This way, you can link your Macintosh to LDAP directories, Active Directory, and more. Also, you can set up discovery of network services using protocols such as AppleTalk and SMB/CIFS.

This utility determines which directory services your Mac uses, and how it connects to specific directory domains, as well as how the Mac discovers network services and also search policies for finding authentication and contacts information in specific directory domains.