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There are three Schedule Types:
Default
The action item will be sent on a per application basis immediately after the task is triggered.
Day(s) of Week
The action item will be sent on the specified day of the week at a time that is after the End Time and will contain results from the time between the specified start time and end time during each task run.
Specific Date(s)
The action item will be sent on the specified date and time after the task is running.