Remote Desktop Issue: “An authentication error occurred” “This could be due to CredSSP encryption oracle remediation”

You may get this error when trying to connect to a Terminal Server from Windows 10 or Windows 7.

1475272411_CredSSPissue.png.edcaf3deca9f340128ef49dc5c3849f5.png

The workaround is to add the following Registry key on the affected client PC.

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters]
“AllowEncryptionOracle”=dword:00000002
This is NOT a fix. Doing this will bypass the fix for the security vulnerability. But it will get your users going while Microsoft readies a fix.

References:

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