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

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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