Ldap Distinguished Name
Every entry in the directory has a distinguished name (DN). The DN is the name that uniquely identifies an entry in the directory.
A distinguished name, which specifies the complete path to the object through the hierarchy of containers can be used to uniquely reference an object. Distinguished names are defined in the LDAP standard as a means of referring to any object in the directory. Distinguished names for Active Directory objects are normally represented using the syntax and rules defined in the LDAP standards.