5 server roles Tightly-coupled in terms of versioning functionality user partitioning geo-affinity Previous Server Role Architecture Internal Network.
Load Balancer MDB HTTP Proxy IIS Client Access RPC CA Mailbox IIS RPS OWA, EAS, EWS, ECP, OAB POP, IMAP SMTPUM POP IMAP Transpo rt UM SMTP POP,
