Desktop disconnects after all PA sessions are closed (OneSign)

If the user manually closes every open Citrix XenApp application, the local desktop will lock automatically, even if the user has applications in use on the local endpoint computer. To prevent this behavior, create the DisableLocking registry key with a Data Type of DWORD and a Value of 1 in one of the following locations:

    32-bit computers: HKLM\Software\SSOProvider\VDI\XenApp
    64-bit computers: HKLM\Software\Wow6432Node\SSOProvider\VDI\XenApp

NOTE: With the value set to 1, if the user leaves Workstation 1 without securing the desktop, then logs into Workstation 2, his XenApp published applications will roam with him to Workstation 2, but Workstation 1's desktop will remain open and unsecured.