Supported upgrade paths
FortiIsolator version 2.3.1 supports the following upgrade path:
- Version 2.3.0 build 0273→ Version 2.3.1 build 0296
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