I am now using Zimbra, and I am planning to move to Exchange 2010. I have about 500 users, some of my top management mail box is over 20GB.
I want to have 1 server as the archive server that i can store all email that migrated from Zimbra.
Could you share me your experience on how to do that with painless? What are the best way, best tools, best practice to do this migration?