Usually this error message appears in BES server Application Log and has been followed by messages like. [SERVICE_RELAY_SESSION:xxxxxxxx] Relay Ping Response not received [SRP] DispatcherSRP Connection dropped, Error=0 [SRP] Ping Response not received [SERVICE_RELAY_SESSION:S30268090:017339d0] Too many relay ping failures - dropping connection. Failures: 10 Such errors may prevent normal BES server functionality . There are various symptoms You  may experience issues with activation, Read more