THE BEST SIDE OF EXCHANGE CERTIFICATE

I've a DAG ecosystem with 6 servers(2Mailbox+2CAS+2EDGE,Exchange2013 CU21), on that circumstance, I just do the method in Anybody mailbox server (such as MX1SVR) after which you can wait The brand new certificate to replicated to the other 5 servers during some hrs ? OR i have to operate the identical approach on just one CAS server and 1 EDGE serv