XA/XD 7.X Desktop Viewer Disappears After Reaching Ctrl+Alt+Del Screen While Launching A XenDesktop

XA/XD 7.X Desktop Viewer Disappears After Reaching Ctrl+Alt+Del Screen While Launching A XenDesktop

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Article ID: CTX227562

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Updated On:

Description

  • While using receiver for web to launch Xendesktop, Desktop Viewer vanishes after reaching Ctrl+Alt+Del screen. User does not even get a chance to enter the credentials.
 
  • The issue is specific to ICA Session and RDP session works fine.
 
  • Looking into the CDF Traces on VDA, we see the below information:

33623 1 2017/09/02 00:01:37:92475 3612 2492 -1 ICA Service_AO _#dotNet#_ 0 3 CDF_NET_INFO ICA Service_AO:2:3:Citrix.Portica.Win7MainFsm.Generic_OnRemoteConsoleConnect BrokerAgent ValidateConnection did not return valid Username/Domain/EncryptedPassword (possible SSOn/Passthrough scenario) => setting credentials not done. Username: Invalid Domain: Invalid EncryptedPassword: Invalid 


33641 1 2017/09/02 00:01:37:92563 3612 2492 -1 ICA Service _#dotNet#_ 0 7 CDF_NET_ENTRY ICA Service:8:7:Citrix.Portica.WinBaseFsm.ValidateEnforceAutoLogon 

33642 1 2017/09/02 00:01:37:92565 3612 2492 -1 ICA Service_AO _#dotNet#_ 0 1 CDF_NET_INFO ICA Service_AO:2:1:Citrix.Portica.Win7MainFsm.Generic_OnRemoteConsoleConnect EnforceAutoLogon: failed to validate ClientCredentials => cancel RemoteConsole session 

 

Environment

Caution! Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.

Resolution

  • As a workaround disable Autologon by creating the below registry key so that user gets a chance to enter the credentials explicitly.

         HKLM\Software\Policy\Citrix\ 
         DWORD EnforceAutoLogon=0

Or
  • As a solution Configure Pass-Through Authentication.

Problem Cause

Pass-Through Authetication was not properly set up but Autologon was enabled. On failing to get valid username and password though Pass-Through authentication, ICA Service goes on to validate EnforceAutologon and fails with error.

Issue/Introduction

While using receiver for web to launch Xendesktop, Desktop Viewer disappers after reaching Ctrl+Alt+Del screen.

Additional Information

How to Manually Install and Configure Citrix Receiver for Pass-Through Authentication
https://support.citrix.com/article/CTX133982


​Configure domain pass-through authentication
https://docs.citrix.com/en-us/receiver/windows/4-7/secure-connections/receiver-windows-configure-passthrough.html

Pass-Through Authentication in Citrix Receiver for Web
https://www.citrix.com/blogs/2014/03/27/pass-through-authentication-in-citrix-receiver-for-web/
 
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