How to fix Remote Desktop “CredSSP encryption Oracle remediation” error when using Windows RDP
Yes, it is a dangerous tool but only if you have a fully unsecured entry point or using poor passwords.
The error recently happened preventing access to numerous servers from Windows 10 machines. The Remote desktop would not connect and gave the following error listed below
An Authentication error has occurred.
The function requested is not supported.
This could be due to CredSSP encryption oracle remediation
Now this occurs within the organization and may not happen everywhere but the OS was Windows Professional 10 with all updates.
The quick fix as it turns out is to add a single key to your workstation’s registry by using the utility REGEDIT.
When REGEDIT starts, click on the following
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
You may have to create the setting CredSSP followed by Parameters.
In there you need to create “AllowEncryptionOracle” as a dword with a value of 2. On my Windows 10 Professional machine i needed to create the CredSSP key, then the Parameters key, then the dword value as none of them existed. There will be no need to reboot the machine and all of a sudden you can connect to the remote desktop.
Baron Software finds that something like this done by a corporation by Microsoft is terrible. Overall a quick fix but a real pain in the neck when it shouldn’t have been that way in the first place.
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