Indicate what, I did a project where we use wcf services (ajax-enabled) (.svc) so that requests could be both ajax and server code.
The company denied entry to the project Through his business accounts so they were in LDAP, the .net framework 4 and allows much faster access to your new class that implemented PrincipalContext call, I am very well qualified and have experience and almost 4 years with the management of svc services.
I am at your service, and we could discuss in detail what you require.
greetings to you