Command line parameters include: /answer[:filename /unattend[:filename /adv /uninstallBinaries /?[:{Promotion | CreateDcAccount ...

Command line parameters include:     /answer[:filename]     /unattend[:filename]     /adv     /uninstallBinaries     /?[:{Promotion | CreateDcAccount | UseExistingAccount | Demotion}]     /CreateDCAccount     /UseExistingAccount:Attach  /answer is used to supply an unattended install script file. /unattend is used to specify the unattend operation mode /adv enables advanced user options. /uninstallBinaries is used to uninstall Active Directory Domain Services binaries. /? will display this help. /?:Promotion, /?:CreateDCAccount, /?:UseExistingAccount, and /?:Demotion    will display unattend parameters applicable to the specified task /CreateDCAccount creates an RODC account /UseExistingAccount:Attach attaches the server to an RODC account  /CreateDCAccount and /UseExistingAccount:Attach are mutually exclusive. Unattend parameters can also be specified on the command-line.  For example:     dcpromo.exe /ReplicaOrNewDomain:Replica