Wyse Management License Expiration Ramifications

To anyone who has seen this happen or not; I am trying to find out what the ramifications of a Dell Wyse Management server with Pro license expiring. I help support a network with a couple of these and the license is primed to expire as we await our new one from a purchasing team. If the license expires will this drop clients on the network and stop them from using their current configuration or will it lapse and nothing will happen initially?