Upgrade
Upgrading from previous EMS versions
FortiClient EMS 6.0.0 supports upgrading from the following EMS versions:
- 1.2.4 and later
Downgrading to previous versions
Downgrading FortiClient EMS 6.0.0 to previous EMS versions is not supported.
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