Masaru-san,
SMMOSS cannot be controlled/managed via CLI.
SMMOSS jobs are managed/scheduled via the SMMOSS scheduler, not the Windows Task Scheduler.
You can set up notification via email in SMMOSS which will send the status of the backup job. I believe that the success or failure of the SMMOSS backup jobs are also logged in the SMMOSS Windows Event Log.
Thanks,
Mark