We are a small environment of 30 users running exchange 2003. some of the mailboxs reaching 10GB with no restriction. We are planning to move to exchange 2010. I have a Blade server Intel Xeon 2.66 & 2.67 and 8GB RAM in which I am planning to install. Attached with iSCSI SAN (Gigabit switch)
I'm Planning to keep all the mailbox store in SAN. Now I am not sure how many servers do i need for my environment for exchange 2010. Should i install all roles Edge, Hub, Client, Unified messaging on the same server or should i divide them into 2 server. The number of users will remain the same.