I’m planning an active directory upgrade of my root and child Windows 2003 domains to windows 2012 R2. I’m trying to find a step by step guide that will assist me in my endeavor. I’ve searched the web but haven’t been able to find anything that I can follow word for word. Because I have two domains I’m a bit concerned about the order in which DC’s should be added and promoted etc. thanks in advance for any help provided.