nevermind515

Yes, you can. In addition, ensure the domain /forest function level is Windows Server 2003 or higher. Understanding Active Directory Functional Levels Similar thread: https://social.technet.microsoft.com/Forums/windowsserver/en-US/02c47b1b-90c8-4eef-8854-4f08ec2fb18c/adding-windows-server-2012-r2-dc-to-a-windows-2008-std-32bit-domain?forum=winserverDS