In Mathematica 10.0.2.0 for Windows, I had been able to run URLFetch against a site requiring NTLM authentication. When I run URLFetch[url, "Headers"] I can see that only one WWW-Authenticate value is available in the HTTP response: {"WWW-Authenticate", "NTLM"}. This indicates that the site only supports NTLM authentication.

After I upgraded to Mathematica 10.2.0.0 for Windows, the same command stopped working. It will prompt for credentials. After I enter the credentials in the dialog the evaluation hangs on the URLFetch command.

Is there any way to run URLFetch against a URL for a site that uses NTLM with Mathematica 10.2.0.0?