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Sean Ohlrich asked on

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.
Windows 7* RDP Failed Connections

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Last Comment
Seth Simmons

8/22/2022 - Mon
DEMAN-BARCELO (MVP) Thierry

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
ASKER CERTIFIED SOLUTION
arnold

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ASKER
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.

https://support.microsoft.com/en-us/help/3140245/update-to-enable-tls-1-1-and-tls-1-2-as-default-secure-protocols-in-wi
Seth Simmons

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)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

seth2740
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