Issue:
Unable to launch multiple sessions for the same user from the same endpoint in XenApp & XenDesktop 7.6

Example:

NOTE: Going straight to StoreFront (bypassing the RDP session on the Terminal Servers) works as expected.
 
History:
This functionality was configured in XenApp 6.5 by disabling Workspace Control and configuring “Override user device names”.
See: http://support.citrix.com/article/CTX123726

In 7.6 Citrix devised an experimental way for handling this use case.  In XenApp 7.7 and later, it was officially introduced and fully supported.
See: http://docs.citrix.com/en-us/xenapp-and-xendesktop/7-7/manage-deployment/sessions.html#par_anchortitle_d65d

To enable this functionality in XenApp & XenDesktop 7.6:

NOTE: While these PowerShell cmdlet’s are not officially supported in XA 7.6 , they can be tested to accomplish this functionality: 

1. Set the BrokerAppEntitlementPolcy via elevated PowerShell:

asnp citrix*

Set-BrokerAppEntitlementPolicyRule <Delivery Group Name> -SessionReconnection DisconnectedOnly
Set-BrokerAppEntitlementPolicyRule <Delivery Group Name> -SessionReconnection SameEndPointOnly

• Computer Configuration\ Administrative Templates\ Windows Components\ Remote Desktop Services\ Remote Desktop Session Host\ Connections\
  • Restrict Remote Desktop Services users to a single Remote Desktop Services Session 
  • Setting = Disabled

                       


       2.b) Edit the RDS server's (server VDA's) registry:

• Start Registry Editor (by default, this is located at c:\windows\regedit.exe).

• Go to the following registry key:

  HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer

• If the fSingleSessionPerUser value doesn't exist, create a new DWORD value.
• Open the fSingleSessionPerUser value.
• The possible values for this setting are as follows:

  0x0  = Allow multiple sessions per user

  0x1 = Force each user to a single session

• Enter the new setting, and then click OK and reboot the server.

Problem Cause

Response from Senior Architect: "There is no support for two sessions from the same client device in 7.x. Only for the same user with different clients."