Jean-Pierre Paradis's Blog Active Directory Windows Server 2003 Windows Server 2012 Active Directory migration overview – Windows Server 2003 to Windows Server 2012 R2 - 4sysops

Active Directory migration overview – Windows Server 2003 to Windows Server 2012 R2 - 4sysops

ParadisJ Active Directory Windows Server 2003 Windows Server 2012

If you have the task of performing an Active Directory migration from Windows Server 2003 to Windows Server 2012 R2, there are a number of steps that you must complete for a smooth transition.

Source : 4sysops