The Lightweight Directory Access Protocol (LDAP) provides a highly popular open standards directory service. It is used in many organizations to display user information to the world. LDAP is also used as a central service to hold user passwords for authentication and can contain information necessary for routing mail, POSIX account administration, and various other pieces of information that external systems may require. Jenkins can directly connect to LDAP for authentication or indirectly through the CAS SSO server (http://www.jasig.org/cas), which then uses LDAP as its password container. Jenkins also has an email plugin (https://wiki.jenkins-ci.org/display/JENKINS/LDAP+Email+Plugin) that pulls its routing information out of LDAP.
Because LDAP is a common enterprise service, Jenkins may also encounter LDAP while running integration tests as...