Plan and Install Active Directory - MCSA Windows Server 2012 R2: Installation and Configuration Study Guide - page 181

12. After the installation is complete, click the Close button.
13. On the left side window, click the AD DS link.
14. Click the More link next to Configuration Required for Active Directory Domain
Services.
15. Under the Post-Deployment Configuration section, click the Promote This Server To A
Domain Controller link.
16. At this point, you will configure this domain controller. You are going to install a new
domain controller in a new domain in a new forest. At the Deployment Configuration
screen, choose the Add A New Forest radio button. You then need to add a root domain
name. In this exercise, I will use Sybex.com . Click Next.