[jrjespersen]

I'm having an issue with the User Management service. On one server, the calls from our custom app to the User Management service succeed. However, when our custom app calls any of our other servers, the web service calls fail (return a null in the response with a status code of HTTP 200). Nothing related shows in the Checkbox exception log.

I'm calling the web service with the following code. I know the values I'm submitting are correct, because I can navigate to the URL and I can login the normal login form with the username and password.

Code snippet:
UserManagementServiceProxy WebServiceProxy = new UserManagementServiceProxy();
WebServiceProxy.Url = URLTextbox.Text;
Nullable<Guid> UserToken = WebServiceProxy.AuthenticateUser(UserIDTextbox.Tex t, PasswordTextbox.Text);

With this snippet, if I point to any server but my dev server, UserToken is always null. Any suggestions for finding the cause of this problem?

Thanks,
Jonathan