Ratio of Exchange 2003 Admins to number of Exchange servers
I noticed a question from a customer who was curious to know how many mailboxes we had at Microsoft, and how many sites, servers and admins we used. Mark answered the question with a set of links that tells all...
Exchange Server 2003 Design and Architecture at Microsoft
Messaging Operations at Microsoft
If you don't get round to reading all the documents, we've got lots and lots of mailboxes, several servers, a few sites and not many admins at all...