Hi Mikel,
Sorry for the late response. Thanks a lot for your detailed test, that's really helpful!
I have found that the issue come from the SharePointUtility.dll, after I replace this dll with the one in the old version (2012-01-28), the NTLM issue has gone. I have uploaded the SharePointUtility.dll, please run the command "gacutil /i <SharePointUtility.dll path>" after you install the new version (2015-06-25), after that, the NTLM issue should be fixed.
Currently I still don't have enough time on this project. I'll investigate the root cause of the issue later. Please let me know if the issue still exists for you.
Thanks
Sorry for the late response. Thanks a lot for your detailed test, that's really helpful!
I have found that the issue come from the SharePointUtility.dll, after I replace this dll with the one in the old version (2012-01-28), the NTLM issue has gone. I have uploaded the SharePointUtility.dll, please run the command "gacutil /i <SharePointUtility.dll path>" after you install the new version (2015-06-25), after that, the NTLM issue should be fixed.
Currently I still don't have enough time on this project. I'll investigate the root cause of the issue later. Please let me know if the issue still exists for you.
Thanks