Hi, I am currently designing our new exchange 2010 infrastructure and am looking into ways to load balance (make redundant) two CAS/HT servers since DAG does that for the mailboxes. I just wondered if there was anyone out there who had something like that in place who wouldn't mind me picking your brain for a few minutes to get some ideas of ways that work and ways that don't. I'd like to get some ideas obviously before I get too far so I don't have to do a 180 and redo a bunch of stuff. Thanks! Ehren J. Benson, MCSE Windows Systems Administrator Department of Physics and Astronomy Michigan State University 1209 A Biomed Phys Sci [log in to unmask]<mailto:[log in to unmask]> 517-884-5469