Windows: Open a rdp file ends up in a warning: Unknown publisher


when you open a Remote Desktop rdp file you will get a warning: Unknown publisher.

Opening of an unsigned RDP File
Opening of an unsigned RDP File

This means the creator of the RDP file could not be verified, because the file is not digitally signed.

The solution is: Sign the file with an certificate which your computer or user account trusts.

An example. If your Computer has a Computer certificate (K

PS D:\> cd CERT:\
PS Cert:\LocalMachine\My\> dir

   PSParentPath: Microsoft.PowerShell.Security\Certificate::LocalMachine\My

Thumbprint                                Subject
----------                                -------

rdpsign /sha256 E09234CE44B9198A0CD5D1672C19C76D8445C21A  "D:\Data\myHost.rdp"

Note: If you got an error: 0x8007000d The certificate needs at least the Keyusage: Digital Signatur and the ExtentedKeyUsage: Serverauthentification (, Clientauthentification (


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