You want to monitor FortiAuthenticator system information and receive FortiAuthenticator traps through SNMP.

To monitor FortiAuthenticator system information and receive FortiAuthenticator traps through SNMP, two configurations must be performed after enabling SNMP access on the FortiAuthenticator interface:

Set the thresholds to trigger SNMP traps for various system events, such as CPU usage, disk usage, memory usage, or temperature.

Upload management information base (MIB) files to SNMP server to enable the server to interpret the SNMP traps sent by FortiAuthenticator.

References: https://docs.fortinet.com/document/fortiauthenticator/6.4.0/administration-guide/906179/system-settings#snmp