Because of a security error the client could not connect to the remote computer

Old CLI thin clients running Microsoft CE 5.0 receive the following error when trying to RDP to a Windows Server 2008 R2 Terminal Server:

Because of a security error, the client could not connect to the remote computer.  Verify that you are logged on to the network, and then try connecting again.
rdp_error01
Follow the steps below to resolve this issue:

  1. On your W2K8R2 TS, open the Remote Desktop Licensing Manager and right-click on your TS server
  • Select Properties
  • In connection method switch from automatic connection to Web Browser
    rdp_error02
  • Right-click on your TS server
  • Select Advanced
  • Select Reactivate Server
  1. Open the registry editor on the W2K8R2 Terminal Server
  2. Export the following registry key on the W2K8R2 TS:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM

  1. Remove the X509 Certificate registry keys
  • Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM
  • Select each of the following values, click Delete, and then click Yes to confirm the deletion:

Certificate
X509 Certificate
X509 Certificate ID
X509 Certificate2

  1. Quit Registry Editor, and then restart the server
  2. Restart the W2K8R2 TS Server

George Almeida

Welcome to my little corner of the blogosphere. I'm an Information Technology Director. I specialize in Windows operating systems, applications, servers, storage, networks and also have a technical background on the IBM iSeries platform. My only purpose for this blog is the hope that it helps someone, someday, somewhere. Any meager proceeds derived from our sponsors will be donated to charity.

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Kalidhasan
8 years ago

said solution not working

Rosta
Rosta
8 years ago
Reply to  George Almeida

Not working for me either :/ I’m using Fujitsu Futro A220 with Windows CE 5.0 and I’m trying to connect to Windows Server 2008 R2. Everything worked just fine for few months but then all of a sudden it just stopped. I’m suspecting one of the updates from Microsoft but who knows…

Adediran Oluwaseyi
Adediran Oluwaseyi
8 years ago

thank you so much for this post… You made my day

Douglas
Douglas
8 years ago

Hello, Thanks a lot… We use a honeywell Data Collector and I have to do this to Work.

Ben
Ben
7 years ago

Thank you for the information… this fixed our issue. after installing RDP licening we had the above error, but your instructions resolved it..
THANKS!!

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