Does Exchange Server 2007 support continuous cluster replication (CCR)?
Windows Small Business Server 2008 cannot participate in a cluster, and so Exchange Server cannot participate in CCR or single copy cluster (SCC) replication technologies. Exchange Server 2007 Standard Edition supports both local continuous replication (LCR) and standby continuous replication (SCR). LCR and SCR are not enabled by default. You would need a second Exchange 2007 Server license for SCR.