Norton Security Suite: Is it possible to schedule Full Idle Scan?

For years I've endured noisy Full Idle Scans during work hours. Every 6 months or so I spend a little time on Google trying to figure out how to schedule the idle time scan to a more appropriate hour (say 1:00am).  However, it does not seem to be possible.

 

I have gone to Settings -> Tasks Scheduling -> Scheduling.

 

This is EXACTLY where the user should be able to set the schedule for the disk scans.  However, I only see the option to set the PC Tuneup Schedule and the Backup Schedule.  I do not use Norton for backups, so I set the PC Tuneup Schedule to only run at 1:00am, hoping that this was some catch-all that included the Full System Idle Scan.  It seems that is not the case, as the Full System Idle Scan routinely commences during the mid-morning and afternoon.

 

Is there anyway to rectify this?

 

Thank you.