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Fix RDP Connection Problem: CredSSP Encryption Oracle Remediation


An authenticaion error has occurred.
The Function requested is not supported.

Remote Computer: X.X.X.X
This could be due to CredSSP encryption oracle remediation.

CredSSP encryption oracle remediation

This error is displayed when you are trying to connect to a computer that does not have the CredSSP encryption oracle remediation error update.

Cause of this Error:

This error occurs if you are trying to establish an insecure RDP connection, and the insecure RDP connection is blocked by an Encryption Oracle Remediation policy setting on the server or client. This setting defines how to build an RDP session by using CredSSP, and whether an insecure RDP is allowed. 


  • Find the CMD ( Command Prompt ) from Computer Search box and Click Run as Administrator.
Command Prompt
  • Copy and Pest the below code in CMD then Press Enter.
 reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters" /f /v AllowEncryptionOracle /t REG_DWORD /d 2


CredSSP Fix Code
Done. Your Problelm is Solved.
Now Try to connect to the RDP connection again. You will be able to do it.

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