From Exchange 2003 to 2007, what is the single biggest change regarding the # of storage groups, databases, or storage limits?
ANSWER: Storage limits are GONE!!! For Exchange 2003, the previous limit of 18GB SP1 and earlier and 75GB w/SP2 is now 16TB, which in theory is unlimited. http://www.microsoft.com/exchange/2007/evaluation/editions.mspx