Hi,Not sure if this is the right section to post my question.I'm having a problem with the WCF Impersonation.What I want it to do is to allow WCF to impersonate a AD user defined in the config file and use it to call a stored proc in the database.So far what I did was:I use the wsHttpBinding.Add the following lines in the web.config: Code Snippet The sql connection string is something like this: