Hi, We are in the process of designing a new Single Exchange 2003. Currently, 5 business units in five different locations across Europe connected throuh VPN (1 mbits). Each location has 800 mailboxes, 1 Exchange server. The network topology is Hub and Spoke: 2 locations are main, and the main location connect to other location. 1) What are the ports to be open to allow traffic between Exchange 2003 servers? 2) If the main locations do not support VPN routing, how the internal mail will flow? thanks in advance
