Install an Additional Domain Controller from IFM (Install From Media) in Windows Server 2012
Advantages of using IFM to install a domain controller in a remote site:
– You can reduce the replication traffic that is initiated during the installation of an additional domain controller in an Active Directory domain. Reducing the replication traffic reduces the time that is necessary to install the additional domain controller.
– You can install many domain controllers from a single source of installation media.
– You do not have to disconnect a functioning domain controller from the replication topology. Therefore, you can avoid the disadvantages that are associated with a domain controller that does not replicate.
– You can avoid having to either replicate the entire Active Directory replica over a wide area network (WAN) link or disconnect an existing domain controller while it is being shipped to the remote site.
windows server 2012