If you want to change a desktop group logoff behavior, this is done by PowerShell.
To turn off shutdown af use:
ASNP Citrix.* Set-BrokerDesktopGroup -Name "Desktop Group Name" -ShutdownDesktopsAfterUse $FALSE
To turn on shutdown af use:
ASNP Citrix.* Set-BrokerDesktopGroup -Name "Desktop Group Name" -ShutdownDesktopsAfterUse $TRUE
If you need to get a list of names of you Desktop Groups, you can run this:
ASNP Citrix.* get-BrokerDesktopGroup | select Name