This seems like a silly question. I have a Domain controller doing Dc and exchange tasks. I have recently bought a new box to put exchange alone on. How do i migrate from the one exchange 2003 to new exchange 2003. At the install wizard it asks if it's a first installation or an additional. It will be the only installation after all the mailboxes are migrated. I plan on uninstalling the other exchange server after the new one is properly implemented and migrated. Please let me know which steps i should do. I'm confused.