Server 2022 Adding Additional Domain Controller To Existing Domain Or Forest | 5- Windows

Open Command Prompt and type repadmin /showrepl . If you see "Successful," your DCs are officially talking.

Choose a strong password and store it in your vault. You’ll only need this if AD breaks and you need to perform "surgery" in Safe Mode. Open Command Prompt and type repadmin /showrepl

The wizard will grumble about "Physical Network Adapters" or "NT 4.0" compatibility. As long as you get the green checkmark at the top, hit Install . Phase 4: The Handshake The server will reboot automatically. Once it’s back up: You’ll only need this if AD breaks and

Keep and Global Catalog (GC) checked (standard practice for redundancy). Phase 4: The Handshake The server will reboot automatically

Building an additional Domain Controller (DC) isn’t just about redundancy; it’s about ensuring your network never has a "bad day." Think of it as hiring a second manager for a busy office—if one goes on vacation (or crashes), the other keeps the business running without anyone noticing.

Once the installation finishes, you’ll see a yellow warning flag in Server Manager. Click it and select .

Now that the new server is a DC, change its Preferred DNS to 127.0.0.1 (itself) and set the Alternate DNS to your first DC. Pro-Tip: The "Forgotten Step"