How can I authenticate to the CrmMetadataService in an IFD environment?

I'm trying to connect to the CrmMetadataService from a custom web service that I am using to run some extensive calculations on data. The environment is CRM 4 installed as an Internet Facing Deployment. I have no trouble using the DiscoverySerbive to issue an authentication token from the CrmService web service. Unfortunately, I'm having trouble configuring the MetaDataService. My Code for the CrmService is as follows:

public static string GetIFDConnection(string organization, string server, string domain, string username, string password, CrmService crmService)
        {
            // Remove any trailing forward slash from the end of the server URL.
            server = server.TrimEnd(new char[] { '/' });

            // Initialize an instance of the CrmDiscoveryService Web service proxy
            CrmDiscoveryService disco = new CrmDiscoveryService();
            disco.Url = server + "/MSCRMServices/2007/SPLA/CrmDiscoveryService.asmx";

            // Retrieve a list of available organizations.
            RetrieveOrganizationsRequest orgRequest = new RetrieveOrganizationsRequest();
            orgRequest.UserId = domain + "\\" + username;
            orgRequest.Password = password;
            RetrieveOrganizationsResponse orgResponse = (RetrieveOrganizationsResponse)disco.Execute(orgRequest);

            // Find the desired organization
            foreach (OrganizationDetail orgdetail in orgResponse.OrganizationDetails)
            {
                if (String.Compare(orgdetail.OrganizationName, organization, true) == 0)
                {
                    //Retrieve the ticket
                    RetrieveCrmTicketRequest ticketRequest = new RetrieveCrmTicketRequest();
                    ticketRequest.OrganizationName = organization;
                    ticketRequest.UserId = domain + "\\" + username;
                    //ticketRequest.UserId = username;
                    ticketRequest.Password = password;
                    RetrieveCrmTicketResponse ticketResponse = (RetrieveCrmTicketResponse)disco.Execute(ticketRequest);

                    // Create the CrmService Web service proxy
                    CrmSdk.CrmAuthenticationToken sdktoken = new CrmSdk.CrmAuthenticationToken();
                    sdktoken.AuthenticationType = 2; // Use IFD Authentication
                    sdktoken.OrganizationName = organization;
                    sdktoken.CrmTicket = ticketResponse.CrmTicket;
                    crmService.CrmAuthenticationTokenValue = sdktoken;
                    return orgdetail.CrmServiceUrl;
                }
            }

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I am setting the token and passing back the service endpoint URL. This works great for the CrmService Web service. Can anyone tell me how to do the same thing to configure the MetadataService? Here is what I have so far...

 
public static string GetMetadataIFDConnection(string organization, string server, string domain, string username, string password, CrmService crmService)
        {
            // Remove any trailing forward slash from the end of the server URL.
            server = server.TrimEnd(new char[] { '/' });

            // Initialize an instance of the CrmDiscoveryService Web service proxy
            CrmDiscoveryService disco = new CrmDiscoveryService();
            disco.Url = server + "/MSCRMServices/2007/SPLA/CrmDiscoveryService.asmx";

            // Retrieve a list of available organizations.
            RetrieveOrganizationsRequest orgRequest = new RetrieveOrganizationsRequest();
            orgRequest.UserId = domain + "\\" + username;
            orgRequest.Password = password;
            RetrieveOrganizationsResponse orgResponse = (RetrieveOrganizationsResponse)disco.Execute(orgRequest);

            // Find the desired organization
            foreach (OrganizationDetail orgdetail in orgResponse.OrganizationDetails)
            {
                if (String.Compare(orgdetail.OrganizationName, organization, true) == 0)
                {
                    //Retrieve the ticket
                    RetrieveCrmTicketRequest ticketRequest = new RetrieveCrmTicketRequest();
                    ticketRequest.OrganizationName = organization;
                    ticketRequest.UserId = domain + "\\" + username;
                    //ticketRequest.UserId = username;
                    ticketRequest.Password = password;
                    RetrieveCrmTicketResponse ticketResponse = (RetrieveCrmTicketResponse)disco.Execute(ticketRequest);

                    // Create the CrmService Web service proxy
                    CrmSdk.CrmAuthenticationToken sdktoken = new CrmSdk.CrmAuthenticationToken();
                    sdktoken.AuthenticationType = 2; // Use IFD Authentication
                    sdktoken.OrganizationName = organization;
                    sdktoken.CrmTicket = ticketResponse.CrmTicket;
                    crmService.CrmAuthenticationTokenValue = sdktoken;
                    return orgdetail.CrmMetadataServiceUrl;
                }
            }
            return "";
        }

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My thought ws to configure it the same way I did with the CrmService but return the  orgdetail.CrmMetadataServiceUrl instead (see the last lines of the method). I'm still getting a authentication error when trying to contact the MetadataService. Any ideas would be appreciated.

Thanks...
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svcoderAsked:
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Aftab_KhateebConnect With a Mentor Commented:
Hi, Have you tried instead of Organisation name the URL of the IFD
for e.g. http://yourServerAddress/yourOrgName/mscrmservices....
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