SNMP
If the SNMP parameters set are not the same on both the device and the device configuration in your FortiNAC software, the two will not be able to communicate. You will not be able to discover or add the device.
Network Security 
Network Security
NOC & SOC Management
Enterprise Networking
Business Communications
Zero Trust Access 
Cloud Security 
Hybrid Cloud Security
Cloud Native Protection
Web Application / API Protection
SAAS Security
Security Operations 
SOC Platform
Advanced Threat Protection
Endpoint Security