This morning when I was trying to connect to development server using remote desktop I started getting this error

Error Details:

An authentication error has occurred.

The function requested is not supported

Remote Computer: 00.00.00.00

This could be due to CredSSP encryption oracle remediation.

For more information, see https://go.microsoft.com/fwlink/?linkid=866660

Root Cause:

This happened due to a Microsoft windows 10 update (Windows 10 version 1709: KB4103729) installed on my machine a day before.

Resolution:

Hopefully this will be fixed in future updates but for now you can de below configuration in your registry to avoid above error.

1. Open Registry editor, go to Run and enter “regedit” and click ok, it will open Registry Editor. Navigate to location “Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System”

   

2. Create a new Key with name “CredSSP”
3. Create one more key with name “Parameters” under above created key.
4. Create a new DWORD (32-bit) Value with name “AllowEncryptionOracle” and Hexadecimal value 2, it should look like below image.

   

This should fix the remote connection issue.