How scan deferral works
To improve performance, you can defer on-demand scan tasks when battery power is low or during full-screen presentations. You can also allow the user to defer scheduled scans in one-hour increments. The increments can last one hour, 24 hours, or the on-demand scan can be deferred forever.
Each user deferral can last one hour. For example, if the Defer at most option is set at 2, the user can defer the scan task two times or two hours. When the maximum specified number of hours elapses, the scan continues. If the administrator allows unlimited deferrals by setting the option to zero, the user can continue deferring the scan forever.