3.2.3 Initialization
In order to use LDAP, the client-side plug-in invokes the Initializing an ADConnection task specified in [MS-ADTS] section 7.6.1.1 with the following parameters, and it stores the new TaskReturnADConnection returned from the task as the ADConnection handle abstract data model element (section 3.2.1):
TaskInputTargetName: MAY be specified by the administrator, or if not specified, NULL.
TaskInputPortNumber: 389