Remote desktop connection: CredSSP encryption error

An authentication error has occured. The function requested is not supported. This could be due to CredSSP encryption oracle remediation.

authentication error - this could be due to CredSSP

If it happens to receive the error above when you are trying to connect remote using Remote Desktop Connection Windows App, fortunately the solution is pretty simple:

  1. Open a Command Prompt window as Administrator.
  2. Run the following command to add a registry value:
REG ADD HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters\ /v AllowEncryptionOracle /t REG_DWORD /d 2

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