I have a set up where I need to add a delegate to various user calendars programmatically. Using a sample from MDSN, I've gotten as far as trying to add the delegate, but after the call to the service binding, I get nothing back...no success or fail....nothing.

How I create the service binidng:

// Initialize the service binding
        serviceBinding = new ExchangeServiceBinding();
        serviceBinding.Credentials = new NetworkCredential(Properties.Settings.Default.UserName, Properties.Settings.Default.Password, Properties.Settings.Default.Domain);
        // A production application should call the autodiscover service to locate the service binding url
        serviceBinding.Url = Properties.Settings.Default.EWSUrlEndPoint;

        serviceBinding.RequestServerVersionValue = new RequestServerVersion();
        serviceBinding.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2007_SP1;

        serviceBinding.AllowAutoRedirect = true;

and the delegate addition:

static void AddDelegate(string email)
    {
        // Create the request.
        AddDelegateType request = new AddDelegateType();

        // Identify the agent's mailbox.
        request.Mailbox = new EmailAddressType();
        request.Mailbox.EmailAddress = email;

        // add the exch_integration user as a delegate
        request.DelegateUsers = new DelegateUserType[1];
        request.DelegateUsers[0] = new DelegateUserType();
        request.DelegateUsers[0].UserId = new UserIdType();
        request.DelegateUsers[0].UserId.PrimarySmtpAddress = "[email protected]";

        // Specify the permissions that are granted to exch_integration
        request.DelegateUsers[0].DelegatePermissions = new DelegatePermissionsType();
        request.DelegateUsers[0].DelegatePermissions.CalendarFolderPermissionLevel = DelegateFolderPermissionLevelType.Author;
        request.DelegateUsers[0].DelegatePermissions.CalendarFolderPermissionLevelSpecified = true;

        // Specify whether the agent recieves meeting requests.
        request.DeliverMeetingRequests = DeliverMeetingRequestsType.DelegatesAndSendInformationToMe;
        request.DeliverMeetingRequestsSpecified = true;

        try
        {
            // Send the request and get the response.
            AddDelegateResponseMessageType response = serviceBinding.AddDelegate(request);
            DelegateUserResponseMessageType[] responseMessages = response.ResponseMessages;

            // One DelegateUserResponseMessageType exists for each attempt to add a delegate user to an account.
            foreach (DelegateUserResponseMessageType user in responseMessages)
            {
                Console.WriteLine("Results of adding user: " + user.ResponseClass.ToString());
                Console.WriteLine(user.DelegateUser.UserId.DisplayName);
                Console.WriteLine(user.DelegateUser.UserId.PrimarySmtpAddress);
                Console.WriteLine(user.DelegateUser.UserId.SID);
            }
            Console.ReadLine();
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
            Console.ReadLine();
        }

    }

The response nothing which must mean that the AddDelegate call isn't hitting the server properly, but I'm not sure. Thanks.