We achieve this by setting up dedicated desktop pool with SSO off (as explained by mittim12) and configuring zero client to use kiosk mode using kiosk user. In this way users work in shift basis who migrated to new VDI did not see any difference as they directly enter their own user name and password to get their desktop. But in this way if the user logged in to different station he will not get his own desktop/profile.
Message was edited by: roshnet