You can configure custom reports that the
firewall generates immediately (on demand) or on schedule (each
night). To understand the selections available to create a purposeful
custom report, see
Custom
Reports.
After the firewall
has generated a scheduled custom report, you risk invalidating the
past results of that report if you modify its configuration to change its
future output. If you need to modify a scheduled report configuration,
the best practice is to create a new report.