In order to assist customers in designing their storage layout for Exchange 2007, Microsoft put together a calculator that focuses on driving the storage requirements (I/O performance and capacity) and what the optimal LUN layout should be based on a set of input factors.

The Mailbox Server Role Storage Requirements Calculator has recently been updated to version 16.3.

For more info on the Mailbox Server Role Storage Requirements Calculator and to download the latest version, visit the Exchange Team Blog