http://blogs.technet.com/jkruse/archive/2007/03/19/exchange-2007-storage-updates.aspxThe Exchange 2007 Mailbox Server Role Storage Requirements Calculator has been updated - http://msexchangeteam.com/archive/2007/01/15/432207.aspx We have also updated the Configuring, validating and monitoring your Exchange 2007 storage article - http://msexchangeteam.com/archive/2007/01/15/432199.aspen-USCommunityServer 2.1 SP1 (Build: 61025.2)