With Exchange 2007, if you want to deploy a transport, hub, and mailbox server in a clustered configuration, what is the minimum number of servers required that is MS supported?
ANSWER: 4 servers. You cannot include combine the mailbox role in a clustered configuration. So, 2 x mailbox and 2 x transport & hub servers. So no clustered failover SBS 2008. :-) That’s a joke, since the question was referring to Standard Edition or higher.