At the moment, no, I'm afraid this is not possible. There are some functions in ePO 4.5 that can help with this kind of administration, like roll-up reporting and policy sharing, but there's no "master server controlling slave servers" function.
Ok, thank you.
What do you think about using the SNMP protocol to queried all the servers ? Is it possible ?
ePO can only generate SNMP traps based on events - you can't query ePO using SNMP, sorry.