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Sean Ohlrich

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Cannot RDP from Windows 7 Pro to RDP Server 2019

Windows 7 RDP client version6.3.9600 RDP 8.1 Supported but fails to connect with error message "Your computer can't connect to the remote computer because an error occurred on the remote computer that you want to connect to.  Contact your network administrator for assistance."  Windows 10 can connect just fine.
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The problem can come from a problem of encryption (CredSSP):

Error (CredSSP encryption oracle remediation) when you try to RDP to a Windows VM in Azure - Virtual Machines | Microsoft Docs 
The problem exists when a workstation not updated is trying to connect to a server updated, or the contrary.

The workaround (registry on the client) is generally the quickest way to verify and connect.

#Add the vulnerability key to allow unpatched clients
REG ADD "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters" /v AllowEncryptionOracle /t REG_DWORD /d 2
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Sean Ohlrich


Our vendor found the fix that worked for us.  There is a TLS 1.2 enable patch from Microsoft, as show in the following link.
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Accept: 'arnold' (https:#a43299566)

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