Add AD to Existent Domain – Powershell

To Add a Write Controller to an existing Domain, first add Domain Services

Add-WindowsFeature AD-Domain-Services

Then install Role:

Install-ADDSDomainController -CreateDnsDelegation:$false -DatabasePath 'D:\Windows\NTDS' -DomainName 'MyExistentDomain.local' -InstallDns:$true -LogPath 'D:\Windows\NTDS' -NoGlobalCatalog:$false -SiteName 'MySite' -SysvolPath 'D:\Windows\SYSVOL' -NoRebootOnCompletion:$true -Force:$true -Credential (Get-Credential MyExistentDomain\AdminUser)

 

Thanks to Mike Robbins http://mikefrobbins.com/2013/03/14/use-powershell-to-add-an-additional-domain-controller-to-an-existing-windows-server-2012-active-directory-domain/