I'm in a network where we're running an Exchange 2010 box with 50 users. We're looking at acquiring a company of 800 employees and will be installing a new Exchange system for all 850 users. I'm just now starting to plan and prepare. Wondering if someone can give me a "general" answer of how many databases I should consider making. So far, I've found in researching answers that are for MUCH larger installations and I'm nervous about going from a very small exchange environment to a much larger one. All of the mailboxes are for general office workers that average about 100 emails per day. Maybe half of the users only have about 50 emails per day. Anyone willing to share their experience?