Hello Paolo, Thank you so much for sharing such  a brilliant idea with me. This works in most cases, where the issue is originated due to a system corruption. Next, type “gpedit.msc” and press Enter to open the Local Group Policy Editor. For more information, see the link. you can also install Microsoft Remote Desktop from Microsoft Store and then take each machine and install this patch.. reg add hklm\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters /v AllowEncryptionOracle /t REG_DWORD /d 2. For your info, Microsoft has published another article if you get the "CredSSP encryption oracle remediation" error when you are connecting via RDP to Windows VM in Azure from the local client. Ready for the next blog? If the patch is applied for the client and the server, you need to do nothing, but in case you cannot or you are patching your server in phases, you need to consider this workaround. Navigate to Computer -> HKEY_LOCAL_MACHINE -> SOFTWARE -> Microsoft -> Windows -> CurrentVersion -> Policies -> System -> CredSSP -> Parameters, 3. Finally, when the company decides to update all the clients and servers, it would be better to change the group policy from the DC to avoid repeating the tasks on the all clients/servers they have changed the policy for it earlier. Doubleclick on the Key “Allow Encryption” Change the value to “2”. Receive news updates via email from this site. So, is it possible to run Win 7 in a Hyper-V and allow it to access a USB port but not access the network? In my case for workarounds I suggested to rdp to an un-patched client that was offline and use it as a jumpbox to rdp to the un-patched hosts, lucky that in my case the hosts to patch were really infinitely small percentage. My working assumption is that it is the server side (running on Azure) that did the upgrade, and that the desktop side has not has CSSP upgraded. This is unbearably frustrating. Fix- Adjust Group Policy settings-Adjust group policy settings on your computer to fix the issue. Commonly, they are using SCCM or WSUS or any third party tool. You can also subscribe without commenting. This vulnerability could allow a MITM … The function requested is not supported. Can you please let me know which OS version you are using? REG ADD HKLMSoftwareMicrosoftWindowsCurrentVersionPoliciesSystemCredSSPParameters /v AllowEncryptionOracle /t REG_DWORD /d 2 One could rollback the security update, but rather than risking other security problems, there’s a quick fix. Is there a KB that is needed on Windows server 2008 or 2008 R2, Windows server 2012, or uninstalled so I preferred to apply the hotfix instead of applying a regkey or create a group policy that should apply the change and after patching revert the change. This article describes workaround  when you get “CredSSP encryption oracle remediation” error message. Did you run it from an elevated command prompt? Thanks you are the only one who mention that ( It needs to be run on the computer you have launched RDP from.). You can install any of the mentioned update from Microsoft update catalog. That's why the first thing you would do would be either changing the group policy or the registry in order to workaround the issue and proceed with your operations. Symptoms You capture a screenshot of an Azure VM that shows the Welcome screen and indicates that the operating system is running. This will provide the protection levels via numerical values: To change the registry key to Vulnerable, you can run the following commands: Want to write for 4sysops? So can we just make this change on the server side to downgrade CSSP to vulnerable status. Announced that it will definitely help u... if you want to install this in. And do nothing else sites ', it did took 2 minutes on their servers and Clients one.! 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