If you’re like me, you have encountered this error remoting into one of your servers.

An Authentication error has occurred. The function requested is not supported.
Remote computer: <servername> This could be due to CredSSP encryption oracle remediation

The quick solution is to patch your host from one of the patches here

If you are unable to patch and then issue the mandatory reboot of the remote server then you can apply the following registry fix

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters]
“AllowEncryptionOracle”=dword:00000002

You can even push this out via Group Policy if needed