RESOLUTION
Unfortunately it is impossible with the current version of Backup Utilities. However, you can use a little "trick":
1) Run 'Plesk Backup' and create a 'Scheduled Backup'. Set all necessary settings for this backup task.
2) The configuration of scheduled backup will be saved into file
%plesk_dir%\backup\backup_schedule.psc 3) To use this configuration file run the following command from the command line:
%plesk_bin%\backup.exe --config-file %plesk_dir%\backup\backup_schedule.psc Plesk backup will be run in background mode.