WHAT DOES HOW TO DOWNLOAD CERTIFICATE FROM OPENCLASSROOM MEAN?

I have a DAG environment with 6 servers(2Mailbox+2CAS+2EDGE,Exchange2013 CU21), on that circumstance, I just do the procedure in Anyone mailbox server (by way of example MX1SVR) and afterwards wait around the new certificate to replicated to the other 5 servers throughout some hours ? OR i should operate precisely the same approach on just one CAS