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

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"

Open Command Prompt and type repadmin /showrepl . If you see "Successful," your DCs are officially talking. Now that the new server is a DC,

Ensure the new server’s time matches the existing DC. Active Directory hates time discrepancies (it’s a Kerberos thing). Phase 2: Installing the Infrastructure Open Server Manager and click Add roles and features . Now that the new server is a DC,

Keep and Global Catalog (GC) checked (standard practice for redundancy). Now that the new server is a DC,