I have 1 Exchange 2010 Enterprise Server (on W2K8 R2 Enterprise) in our single domain with 2 sites. I ned to install another one in our DR site which will use DAG withthe current Exchaneg Server. Are there any specific steps that I need to know before I install this Exchange Server? Do I just install it like the current Exchaneg Server which Iinstaled? The current one only has the 3 basic roles (mailbox, CAS, hub transport). Any helpful ideas or documents? Thanks.