5- Windows Server 2022 Adding Additional Domain Controller To Existing Domain Or Forest May 2026

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 .

Open Command Prompt and type repadmin /showrepl . If you see "Successful," your DCs are officially talking. Ensure the new server’s time matches the existing DC

Note: This only installs the "books." We still need to "open the library." Phase 3: The Promotion (The Fun Part) Open Command Prompt and type repadmin /showrepl

Select "Add a domain controller to an existing domain." Provide your domain name (e.g., ://contoso.com ) and the credentials of a Domain Admin. Domain Controller Options: pick the closest one.

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

Choose where to replicate from. Selecting "Any domain controller" is usually fine, but if you're across a slow WAN link, pick the closest one.