Exchange RPC HTTP

I am trying to get RPC /HTTP running on SBS 2003. I have installed a SSL cert from Go Daddy and OWA https works perfectly. However, I am unable to get Outlook to connect.

I have followed the setup procedures on http://www.petri.co.il/how-can-i-configure-rpc-over-https-on-exchange-2003-single-server-scenario.htm.

entering https://fully.qualified.domain.name/RPC into my web browser on a different LAN returns a username and password box. However, it never accepts the username/password combo.

Here are my test results.
      Testing RPC/HTTP connectivity.
       The RPC/HTTP test failed.
       
      Test Steps
       
      Attempting to resolve the host name owa.bhfitness.com.au in DNS.
       The host name resolved successfully.
       
      Additional Details
      Testing TCP port 443 on host owa.domain.com.au to ensure it's listening and open.
       The port was opened successfully.
      Testing the SSL certificate to make sure it's valid.
       The certificate passed all validation requirements.
       
      Test Steps
      Checking the IIS configuration for client certificate authentication.
       Client certificate authentication wasn't detected.
       
      Additional Details
       Accept/Require Client Certificates isn't configured.
      Testing HTTP Authentication Methods for URL https://owa.domain.com.au/rpc/rpcproxy.dll.
       The HTTP authentication test failed.
       
      Additional Details
       Exception details:
Message: The underlying connection was closed: The connection was closed unexpectedly.
Type: System.Net.WebException
Stack trace:
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.Exchange.Tools.ExRca.Tests.HttpAuthMethodsTest.GetSupportedHttpAuthMethods()
at Microsoft.Exchange.Tools.ExRca.Tests.HttpAuthMethodsTest.PerformTestReally()