Upgrading from Exchange 2003 (one Exchange Server) to Exchange 2010. We have about 250 users and the average mailbox size in 2003 is about 150MB. We cap the mailbox size at 1GB. Have just a few users that bump into this limit occasionally. Can someone give me a real-world example (especially if your company size is similar) of how your email configuration is (number of servers, size of database etc.).
The calculators we look at all want to go based on the 1GB max mailbox size and want us to have at least a 250GB database for email. Currently the Exchange 2003 mailbox database is about 30GB.