Question:-I am planning to build DR Site in Exchange 2010. What I have plan for DR site. Currntly I have live enviroment in NYC with 1 GC, 1 CAS/HUB, 2MBX with DAG , Going to Plan DR site on Washington. I am fresher here , So Please let me know from the step 1st . How manys Public / Private Ip I need is this all are in same series which I have in live enviroment.

Step 1: You need 1 GC, 1 CAS/hub, 1 MBX in Washington. CAS/hub can be combined with MBX if you need

Please visit following URLs to know more about DR site in exchange 2010. http://blogs.microsoft.co.il/blogs/eldadc/archive/2010/04/14/how-to-configure-exchange-2010-disaster-recovery-site-using-dag.aspx http://www.enowconsulting.com/about-enow/solutions-engine-blog/bid/134289/Exchange-2010-Site-and-Server-Disaster-Recovery-on-a-Shoestring-Part1-Building-the-Solution