THE FACT ABOUT EXCHANGE CERTIFICATE THAT NO ONE IS SUGGESTING

I've a DAG natural environment with 6 servers(2Mailbox+2CAS+2EDGE,Exchange2013 CU21), on that case, I just do the procedure in Anybody mailbox server (one example is MX1SVR) after which wait around The brand new certificate to replicated to the other 5 servers all through some hrs ? OR i really need to run the same procedure on one CAS server and o