FortiOS support
FortiManager Cloud version 6.4.3 supports the following FortiOS versions:
- 6.4.0 to 6.4.3
- 6.2.0 to 6.2.5
- 6.0.9 and later
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