Follow the wizard to and check Active Directory Domain Services . Click "Add Features" when prompted, then hit Install .
Don't forget to update your ! Your client computers should now have both DC IPs listed as their DNS servers. This ensures that if DC1 goes down for updates, your users can still log in and reach the internet. Follow the wizard to and check Active Directory
Open Command Prompt and type repadmin /showrepl . If you see "Successful," your DCs are officially talking. Follow the wizard to and check Active Directory
Keep and Global Catalog (GC) checked (standard practice for redundancy). Follow the wizard to and check Active Directory