I need to read secured map services (not feature services) from ArcGIS portal into my workspace. Before upgrading to portal, I was able to use the HTTP caller to access the REST services. Now I'm trying to use the Esri ArcGIS Portal Feature Service reader, which obviously isn't working because they are not feature services. Any ideas on how I might access the secured services? I don't think I can still use the HTTP caller because our access is windows authenticated (NTLM), therefore getting tokens is not an option.