If they are under software assurance, I would put the latest version of 8 on the new controller with the current system address and program the dns settings, backup the old, shut down old, move iButton from old to new, license and restore. The raid controller cannot be moved.
The key is to make the ip address the same before any restore. You could also do a backup, reset hardware id on AMC Licenses new controller and restore then just shutdown old and swap. This way the stickers on the controller will match ibutton. I myself don't use any sticker value to determine the id