Fortimanager Bulk device config export

Hi,

Was wondering if there is a way to Bulk export all the device configs from the Fortimanager Appliance, we have over 100 managed firewalls and we need the individual config files for auditing purposes, I have have even tried extracting the backup from the Fortimanager appliance but was not able to find anything that looks like a device config.

Regards,

Jason