How to set up a config-only HA in FortiMail
FortiMail supports two types of HA modes: active-passive HA pairs and config-only HA clusters. This recipe describes how to set up a config-only HA.
Config-only allows up to 25 FortiMail units to use an identical configuration, without synchronizing data and therefore operating as independent FortiMail units.
Before beginning these procedures, be sure to register all FortiMail units in the HA group with Fortinet Support.