The parameters that can be used for a silent install of RMAD are msiexec parameters:
Msiexec /i "E:\Setup\RMAD_x64.msi" /qb SQLSERVER="<SQLServerName>\<InstanceName>" SQLDBNAME_REPORTING="<DatabaseName>" INSTALLDIR="<PathToInstallationFolder>" BACKUP_PATH="<PathToStoreADBackups>" SQLAUTHENTICATION="0 OR 1" SQLUSERNAME="<UserName>"
SQLUSERPASSWORD="<Password>" VIEWER_APPLICATION_TYPE="<Value>" VIEWER_REPORTING_SERVER=
"http://<HTTPAddress>"
For SQLAUTHENTICATION enter 0 to use the Windows credentials of the current user account or 1 to use the credentials provided in the SQLUSERNAME and SQLUSERPASSWORD parameters. If using 0, the SQLUSERNAME and SQLUSERPASSWORD parameters are not needed.
For VIEWER_APPLICATION_TYPE enter local to use the built in Quest Reports Viewer or remote to use Microsoft SQL Server Reporting Services installed on a remote computer. If remote is provided for the VIEWER_APPLICATION_TYPE you need to use the VIEWER_REPORTING_SERVER parameter and provide the http address of the SSRS server.
More information on each of the parameters available and the possible values can be found on pages 9-11 of the Quick Start Guide