AD LDS allows you to provide directory services to applications that are free of the confines of Active Directory. To list all the AD LDS instances on a server, follow this procedure:
Log into the server in question
Open a command prompt.
Type dsdbutil and press Enter
Type List Instances and press Enter.
You will receive a list of the instance name, both the LDAP and SSL port numbers, the location of the database, and its status.