About FortiWLC 8.5.5
FortiWLC release 8.5.5 delivers NPlus1 enhancements and resolved outstanding issues, see sections Enhancements and Fixed Issues .
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