Q. How can I install a domain controller (DC) from backup media by using a Dcpromo answer file?

A. To create a DC from a backup during the Dcpromo process, add these two entries to the answer file:

ReplicateFromMedia=Yes
ReplicationSourcePath=<media_source_path>

Your answer file entries should look something like this:

[Unattended]
UnattendMode=FullUnattended

[DCInstall]
AllowAnonymousAccess=No
AutoConfigDNS=No
DatabasePath=<Db_Path>
LogPath=<Log_Path>
SysVolPath=<SysVol_Path>
Password=<User_Pwd>
UserDomain=<Net_Bios_Domain_Name>
UserName=<User_Name>
ReplicaDomainDNSName=<DNS_Domain_Name>
CriticalReplicationOnly=No
ReplicaOrNewDomain=Replica
SafeModeAdminPassword=<safe_mode_pwd>
RebootOnSuccess=Yes
ReplicateFromMedia=Yes
ReplicationSourcePath=<media_source_path>
ConfirmGC = Yes