The requirement to automatically close open Incident Tasks when a parent Incident is closed or canceled is controlled by a specific system property. This property can be set in two primary ways:

1. Navigating to Incident > Administration > Incident Properties and setting the option labeled "Close open Incident Tasks when Incident is closed or canceled" to Yes.

2. Directly modifying the system property com.snc.incident.incidenttask.closure to true in the System Properties [sysproperties] table.

Both methods achieve the same outcome by enabling the business rule named "Close Incident Tasks".

C. The property com.snc.incident.autoclose.basedon.resolvedat is used to automatically close Incidents that have been in a 'Resolved' state for a specified duration, not to close child Incident Tasks.

D. "Autoclose Incident Tasks" is not the correct label for the setting within the Incident Properties module. The official label is more descriptive, as stated in option A.

1. ServiceNow Product Documentation: Incident Management properties. This document details the available properties for the Incident Management application. It explicitly lists the property with the label "Close open Incident Tasks when Incident is closed or canceled" and its corresponding system property name com.snc.incident.incidenttask.closure. The description confirms its function: "If set to true

all open incident tasks are closed when the incident is closed or canceled."

2. ServiceNow Product Documentation: Configure Incident Management. This guide provides an overview of configuring Incident Management

including navigating to the Incident Properties page where the relevant setting is located. (Section: "Configure Incident Management properties").