Unable to connect via RDP: CredSSP encryption Oracle remediation

Update: this blog post pretty much says the same, however seems to have some more information on the issue and additional workarounds! If you want the details, check there, if you want the quick fix for Windows 10, this place is as good as it gets 😉

Today I came across several machines where I would not be able to connect via Remote Desktop, using RDP (Remote Desktop Protocol).

This was the error:

1_rdp_error

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

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

The issue did not have anything to do with connecting to an Oracle machine, so I was pretty much in the dark about this.

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