LDAP (Lightweight Directory Access Protocol) is a standard Internet protocol for accessing commonly used network directories. If you are new to GroupWise® or LDAP, you might find it useful to review TID 2955731: GroupWise and LDAP, which provides an overview of LDAP and explains the two address-book-related ways that GroupWise makes use of LDAP. This section briefly summarizes the address book usages of LDAP and explains how LDAP can also be used to store security information such as passwords and certificates for use with GroupWise.