Hello all. Where can I get design information about how many Exchange 2003 servers I need to service 15000 mailboxes? What is the software's limitations? Additionally, could someone contact meregardinghow I could getcontact information for ourMicrosoft Account Team? Thanks in advance for your assistance. Kyle

How many users you can put on a server depends on many factors. So there exists no number that I can give to you. The best way is to read plan and deploy sections. http://technet.microsoft.com/en-us/exchange/bb288525.aspx