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I just tried remoting to my work PC from home and got the "identity cannot be verified" prompt like the one below. I marked the "Don't ask me again for connections to this computer" box, and then accidentally clicked No (do not connect) instead of Yes. Now when I try to connect it asks me for my password, but then it does not connect and it goes back to the RDC login prompt.

How can I undo this setting? I looked in the MMC Certificates snap-ins, but did not find anything that looks related to my work computer. I also tried deleting Default.rdp, but there's nothing relevant in that file either. Any help is much appreciated!

Remote Desktop Connection Certificate prompt

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In the connection dialog if you click Options, then click the Advanced tab you can choose what to do if the server cannot be verified. Make sure it's not set to 'Do Not Connect'. – James Jun 15 '11 at 14:47
James, thanks for replying. I've tried each of the options there, and even "Connect and don't warn me" results in the same behavior, so I think my mistake with the "Don't ask me again" setting is overriding this. – pibboater Jun 15 '11 at 14:51
up vote 7 down vote accepted
  1. Open Registry Editor (regedit.exe)
  2. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers
  3. Delete the connection info for the computer that you want to reset

The next time you log in, type the name, and the request returns.

I tested this.

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Perfect, this is exactly what I was looking for. Thanks!! – pibboater Jun 16 '11 at 0:24
It seems like it doesn't work for Windows 8.. can't get certificate warning back.. – Tarkus Aug 14 '12 at 21:07
I don't think this is correct. The correct entry to delete is HKCU\Software\Microsoft\Terminal Server\Client\LocalDevices\<name>. – Michael Steele Nov 26 '12 at 22:14

This worked for me as well in Windows 7. Due to this issue, I was strangely unable to login to RDP.

These are the steps I have done

1) Remove the Default.rdf from Documents folder. It will be hidden
2) Remove the RDP connection folder using regedit in the following folder
HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers
3) Run mmc.exe. Add Snap In -> Cerificates -> Computer Account -> Local Computer -> Finish
Expand the Added Certificate -> Remote Desktop folder and remove the certificate issued.
4) Do Step 3 in remote desktop as well

Thanks, Sarath

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