From the reader mailbag:
Can you recommend books or training on Exchange 2010?
Why yes, I can!
My current favorite Exchange 2010 book is from Jim McBee and David Elfassy: Mastering Exchange Server 2010. It’s a solid overview of the key features and technologies in Exchange 2010, although I’d like to see a second edition with more coverage of DAGs.
As for training, I don’t have much to say on that topic at the moment, but I hope to in a few weeks.
Paul's Down-Home Page 
Technology going to groom up and now requirement is to prone it same time.
More applications / services bundled in one software.
I was looking for a good book to start study and plan my migratin of Exch 2007 servers to MS Exch 2010.
I got this great book.
Thanks to the author.