Question: how to upgrade windows 2003 domain controller to 2012?
Answer: Raise and Verify AD Forest Functional Levels. Pro Tip No. ... , Step 1: Prepare a Windows Server 2012 R2 Server. Begin with the basics. ... , Step 2: Add the AD DS Role on the New Server. ... , Step 3: Promote the Windows Server 2012 R2 Server to a DC. ... , Step 4: Transfer the FSMO Roles. ... , Step 5: Decommission the Windows Server 2003 DC.