The provided URI scheme 'https' is invalid; expected 'http' when calling web service

I am trying to call a SharePoint web service from a CRM workflow using custom C# code. However when I run my code, I get the following error: `The provided URI scheme 'https' is invalid; expected 'http'. Parameter name: via` Here is the offending code: ``` #region Set up security binding and service endpoint BasicHttpBinding binding = new BasicHttpBinding(BasicHttpSecurityMode.TransportCredentialOnly); binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Ntlm; binding.Security.Transport.ProxyCredentialType = HttpProxyCredentialType.Ntlm; EndpointAddress endpoint = new EndpointAddress(endpointAddress); #endregion #region Create the client and supply appropriate credentials CopySPContents.CopyService.SharepointFileServiceClient client = new CopySPContents.CopyService.SharepointFileServiceClient(binding, endpoint); client.ClientCredentials.Windows.ClientCredential = System.Net.CredentialCache.DefaultNetworkCredentials; client.ClientCredentials.Windows.AllowedImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Impersonation; #endregion #region Call the web service and trace its response String response = client.CopyFolderContentsAcrossSites(sourceSiteURL, sourceFolderURL, destinationSiteURL, destinationFolderURL); #endregion ``` The error gets thrown on the line `String response = client.CopyFolderContentsAcrossSites(sourceSiteURL, sourceFolderURL, destinationSiteURL, destinationFolderURL);` where the client's method is called. Thanks for any help, Scott