Friends here, I would like to tell you that Microsoft keeps on updating Windows updates from time to time, Microsoft in March 2018 to fix the vulnerabilities of CredSSP (Credential Security Support Provider Protocol) used by Remote Desktop Protocol in Windows Server. Has issued some security patches. But a recent update has made the CredSSP authentication error in RDP and has created a barrier for many users.
Microsoft has made the May 2018 update mandatory for both client and server computers so that they can install the update. This resulted in Windows servers not accessible to many users via RDP and thinking of it as a server side issue made many to reboot their servers to fix the problem. This blog helps you to fix CredSSP authentication error in Remote Desktop Protocol (RDP
What is CredSSP?
Friends, we went on to tell you that in May Microsoft made a Windows Update fix. Microsoft found an error in the remote desktop. How does it validate requests during the credential authentication process. Microsoft has detected a credential error in rdp and has essentially found a fix for the vulnerability in order to update both client and server computers to work properly.
An authentication error has occurred.
The function requested is not supported
Remote computer: <computer name="">
This could be due to CredSSP encryption oracle remediation.For more information, see the link
This error is due to the windows update not installed either on the server or on the client computer.
How to fix it?
Tell you that in microsoft windows
To fix the problem, you need to uninstall the update and revert to the old version. But reverting to an earlier version is not a good practice. You can fix this by changing the Group Policy in the local computer to use a weaker setting
1. Go to “Run” (Win Key + R)
2. Type “gpedit.msc” and click “Enter
3. Go to Computer Configuration -> Administrative Template -> System -> Credentials Delegation -> Encryption Oracle Remediation
4. Double Click on “Encryption Oracle Remediation”, choose “Enable” and change protection level to “Vulnerable” and click “Apply” or “Ok”
You can also fix the issue with the help of a Windows Registry Editor
1. Open Windows Registry by typing “regedit” in “Run”
2. Navigate to Computer -> HKEY_LOCAL_MACHINE -> SOFTWARE -> Microsoft -> Windows -> CurrentVersion -> Policies -> System -> CredSSP -> Parameters
3. Doubleclick on the Key “AllowEncryptionOracle” Change the value to “2”
This method also gives the same output as achieved through the Group Policy Editor. You may use the below table from Microsoft to compare the installed windows update for CredSSP.
How to: Fix – Remote session was disconnected because there are no Remote Desktop client access licenses
