Chapter 17. Using LDAP Directory Services

Lightweight Directory Access Protocol (LDAP) is a standard method for querying directory services. For example, you can query LDAP servers for the address, phone number, or other information associated with an entry in the directory. Microsoft® Windows® 2000 Server (and later versions of Windows Server) use LDAP as the primary mechanism for accessing the Active Directory® directory service. Servers running Microsoft Exchange Server can also act as LDAP servers, allowing users to look up addresses and associated information in the directory.

This chapter explores LDAP and explains how to configure LDAP directory service accounts in Microsoft Office Outlook® 2007 and Microsoft Windows Mail.

Overview of LDAP Services

LDAP was designed to require less overhead and fewer resources than its predecessor, Directory Access Protocol (DAP), which was developed for X.500, a standards-based directory service. LDAP is a standards-based protocol that allows clients to query data in a directory service over a TCP connection. Microsoft Active Directory, Novell eDirectory, IBM WebSphere, and directory services on the Internet such as Bigfoot, InfoSpace, and Yahoo! all employ LDAP to implement searches of their databases.

Note

For additional information about Microsoft’s early strategies for implementing LDAP as part of Active Directory, refer to "MS Strategy for Lightweight Directory Access Protocol (LDAP)," available in the Microsoft Windows NT® Server Technical Notes section of Microsoft TechNet or on the Web at www.microsoft.com/technet/archive/winntas/plan/ldapcmr.mspx. Although the material is now archived, it is still relevant for planning an LDAP-based directory service for use with Active Directory.

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