Remote Desktop Connection
An authentication error has occurred.
The function requested is not supported
Remote computer: <hostname or ip address>
This could be due to CredSSP encryption oracle remediation.
For more information, see https://go.microsoft.com/fwlink/?linkid=866660
This error appears after I’ve updated Windows. If you are update also the Server where you want connect this should be first and better solution. if you are connecting to a server of a Customer or 3rd party that you cannot update, you can use Solution 2.
Open Local Group Policy Editor (executing gpedit.msc)
Navigate to Computer Configuration -> Administrative Templates -> System -> Credential Delegation
Double-click on Encryption Oracle Remediation the select Enabled and change Protection Level to Vulnerable click Apply then OK.