CredSSP Message when using Remote Desktop

When connecting using Windows Remote Desktop this message is displayed.

An authentication error has occurred.
The function is not supported

This could be due to CredSSP encryption oracle remediation.
For more information, see https://go.microsoft.com/fwlink/?linkid=866660

The fix is to change the group policy setting on the connecting PC as follows:-

Run gpedit.msc
Go to: Computer Configuration -> Administrative Templates -> System -> Credentials Delegation -> Encryption Oracle Remediation

Open - Encryption Oracle Remediation and choose 'Enable'
Change the protection level to Vulnerable and click Apply

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