The server has rejected the client credentials, WCF as Windows Service

Question

I am able to connect to my WCF service with the Win-form application, however i am not able to do so with my windows service. Whenever i fire open() to the proxy it throws t

Answer 1

Basically what is happening is that your calling service doesn't have the appropriate credentials, like you would have when calling from WinForms. What you need is some impersonation. It takes a bit of setting up, and is kind of annoying, but it will work.

Luckily MSDN has a nice little walkthrough.
http://msdn.microsoft.com/en-us/library/ms731090.aspx

There is some more general information on the topic here:
http://msdn.microsoft.com/en-us/library/ms730088.aspx

UPDATE:
Setting impersonation flags is not enough. You have to actually impersonate a credential to make it work. For example:

  // Let's assume that this code is run inside of the calling service.
  var winIdentity = ServiceSecurityContext.Current.WindowsIdentity;
  using (var impContext = winIdentity.Impersonate())
  {
    // So this would be the service call that is failing otherwise.
    return MyService.MyServiceCall();
  }