Hyper-V Manager – Connect to VM CredSSP error

[Window Title]
Remote Desktop Connection

An authentication error has occurred.
The function requested is not supported

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

The most annoying part about this was everything was fine

So I did the usual checks

1. Make sure the Windows Remote Management (WS-Management) Service is running

2. verify that CredSSP is enabled

3. Review the current settings

4. Make sure delegation is allowed from the host hyper-v server

Everything looked ok

Finally I stumbled on this MS article on credssp remediation error when RDP

Made the necessary registry key and value here

There is no reboot required, it worked immediately.
Yes you may now be vulnerable to the encryption oracle attack see Microsoft here

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