Workflow Application: CANCELREQUEST usage

The CANCELREQUEST workflow application lets you cancel an ongoing request.

Required parameter

Parameter                                    Type       Direction Description
REQUEST_ID Numeric IN The request ID to cancel

Optional parameter

Parameter                                    Type       Direction Description
NOTIFY_PARTICIPANT Text IN Possible values: Y or N (default: N). If Y, request participants will be notified of the cancellation.

When I set NOTIFY_PARTICIPANT to Y, I don’t see any notifications sent out. How exactly does it work? Who gets notified? Everyone in every participants? Everyone involved in the process? I tested this and no email was sent at all.