I have a Primary AD and a backup AD server running Windows 2003. I am already familiar with how to upgrade the 2003 domain to 2012 but what I am not clear on is how to proceed with the backup AD server. Should I dcpromo the backup 2003 AD server before doing dcpromo on the primary AD 2003 version and then once everything is done (removing both old 2003 AD servers) and simply add on a new AD backup 2012 server?
Hopefully, I didn't confuse people here :)
Any thoughts or suggestions would be greatly appreciated.