Install an Additional Domain Controller by Using Unattend Parameters from the Command Line

Applies To: Windows Server 2008, Windows Server 2008 R2

You can use the following procedure to install a new domain controller from the command line. In this method of installation, you type unattended installation parameters at the command line rather than creating an answer file. For a complete list of unattended installation options, including default values, allowed values, and descriptions, type dcpromo /?:Promotion at a command prompt, or see Promotion Operation (

Membership in Domain Admins, or equivalent, is the minimum required to complete this procedure. Review details about using the appropriate accounts and group memberships at Local and Domain Default Groups (

To install an additional domain controller by entering unattended installation parameters at the command line

  • At a command prompt, type the following command. When you have typed all the options that are required to create the additional domain controller, press ENTER.

    dcpromo /unattend /<unattendOption>:<value> /<unattendOption>:<value> ...


    • <unattendOption> is an option in the Promotion Operation table. Separate each <option:value> pair with a space.

    • <value> is the configuration instruction for the option.

    The following example creates an additional domain controller with the global catalog, and it installs and configures the DNS Server service:

    dcpromo /unattend /InstallDns:yes /confirmGC:yes /replicaOrNewDomain:replica /databasePath:"e:\ntds" /logPath:"e:\ntdslogs" /sysvolpath:"g:\sysvol" /safeModeAdminPassword:FH#3573.cK /rebootOnCompletion:yes