Have you created VDB yet based on the above links? This two step process, and they are completely independent.
First, using Teiid Designer yo uneed to create VDB that exposes your LDAP source as relational source. The above links give information on it. I see that Teiid needs better documentation on this. Once you have the VDB created, then you need to decide what kind of web service you need to create SOAP or REST. For both, Teiid Designer gives options to right click and generate the respective WAR files. Then you need to deploy the VDB along with connection configuration to LDAP and WAR file in the Teiid Server.