Troubleshooting Tip: Unable to Add Device in FortiManager via Discover Device with error 'Insufficient number of licenses'

Description

This article describes what can be checked when encountering the error 'Insufficient number of licenses' when discovering a device from FortiManager.

Scope

 FortiManager.

Solution

The following issue may be encountered when trying to add a new device via Discover Device to FortiManager.

Checking the ADOM list, FortiManager only shows 9 devices/VDOMs being managed.

In most cases, the cause of this is that there are Unauthorized Devices in the root ADOM.

Unauthorized Devices in FortiManager will count towards the maximum devices/VDOM limit, preventing additional devices to be added via “Discover Device” method in FortiManager. This can also be verified using the following CLI command:

diagnose dvm device list

Once the device is deleted from the Unauthorized Devices list, other devices should be able to be added to FortiManager via the 'Discover Device' method.

Troubleshooting :

The following command can be used on the FortiManager CLI to delete the device:

diagnose dvm device delete <Adom-name> <Device-name>