Your computer can’t connect to the Remote Desktop Gateway server after Windows 10 Creator Update

My remote gateway app is hosted on Windows Server 2008 R2 and I was able to connect to the Remote Desktop environment in Windows 10 Pro. However, after I upgrade my Surface Pro 4 tablet to Creator Update, it is not working at all and I receive the error message “Your computer can’t connect to the Remote Desktop Gateway server. Contact your network administrator for assistance.” I would like to get the new feature of microsoft RDC client like Scaling and now the program is broken. How can I resolve the problem and get it working?

In Windows 10 Creator Update, the new version of RDC is forced to use Kerberos authentification to authenticate in RDG, while RDG only support NTLM, without Kerberos auth. You could try any of the methods to get rid of that.
A workaround
* Open File Explorer, type %windir%\system32\ into address bar and press Enter to access the location.
* Find two files, including mstsc.exe and mstscax.dll, and rename them. However, you can not do that directly because Windows 10 doesn’t give you the RW permissions for them.
Right click on mstsc.exe file, click Properties, go to the Security tab.
Click Advanced, and then click the Owner tab.
Click Edit, and change the owner to your current local account, then grant the user the full RW (read and write) permissions. And repeat the same way with mstscax.dll file.
Finally rename them as mstsc.exe.BAK and mstscax.dll.BAK.
* Open your your main OS drive and by default it is C:\. Open the C:\Windows.old folder, go inside the system32 directory, copy the mstsc.exe and mstscax.dll files over to %windir%\system32\.

Another method is to get the Remote Desktop App from the Windows Store via the link and use it to connect with RDG and enable NTLM auth, but it has limited functionality. If you are technicians, the alternative is the Remote Desktop Connection Manager and it works as well in Windows 10 Creator Update.

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