The "Not" checkbox is a logical operator that inverts the specific condition to which it is applied. In the provided image, the condition is based on the "Primary Classification" property with the value "Function". By checking the "Not" box, the logic is reversed. The policy will now match endpoints where the "Primary Classification" is anything other than "Function". This action directly negates the criteria defined within that specific property clause, making it a condition of exclusion rather than inclusion for the specified value.

A. The matching of irresolvable hosts is explicitly controlled by the "Evaluate irresolvable as" setting, not the "Not" checkbox.

C. The "Not" checkbox's scope is limited to the property it is adjacent to ("Primary Classification"); it does not affect other conditions outside this property.

D. The "Not" checkbox negates the property's value check for resolvable hosts; it does not alter the separate "Evaluate irresolvable as" setting.

E. The "Not" checkbox and the "Evaluate irresolvable as" setting are two independent controls within the condition configuration; one does not negate the other.

1. Forescout Administration Guide, Version 8.2.2. Section: "Create a Policy Condition", Page 385. The guide explains the components of the Conditions pane, stating: "Select the Not checkbox to negate the statement." This confirms that the checkbox's function is to negate the criteria of the property it is associated with.

2. Forescout Administration Guide, Version 8.2.2. Section: "Handling Endpoints with Irresolvable Properties", Page 390. This section describes the "Evaluate irresolvable as" setting as a separate control to determine how to handle endpoints for which a property cannot be resolved. This confirms that its function is distinct from the "Not" checkbox, invalidating options A, D, and E.