I don't usually like posting to other peoples blogs, but the one I will make an exception for is the Exchange Team Blog.  I specifically want to raise awareness of Scott’s HA misconceptions article – not only does it clear up quite a few misconceptions, but its also a highly condensed HA primer for anyone considering Exchange HA (and why wouldn't they be?!) Smile

http://blogs.technet.com/b/exchange/archive/2011/05/31/exchange-2010-high-availability-misconceptions-addressed.aspx

Neil.