Somebody please make me understand difference between DAG & Standby Continuous Replication ? Although i read few manuals on Standby Continuous Replication (SCR) but hardly able to spot any major difference between DAG &

SCR was ( Since its a 2007 thing) intended as a standby, DR recovery technique. While DAGs can certainly be used in the same manner, DAG members are peers to each other. You can have 16 mailboxes in a DAG. SCR is a single server or cluster that was a target for the primary mailbox servers - activated generally only during a DR.

In a lot of ways, SCR is similar to a lagged DAG copy in Exchange 2010.

Thanks Andy!