FortiGate HA pair upgrade in Azure cloud, in different Availability Zones

[priyarf5]

FortiGate HA pair upgrade in Azure cloud, in different Availability Zones.

will the master unit keep existing firmware version, while upgrade new version on slave unit ?

[Piotr_Nowotarski]

If we are talking about Active-Passive HA cluster, by default there will be uninterrupted upgraded performed. Details can be fund here https://docs.fortinet.com/document/fortigate/7.6.0/administration-guide/247944/upgrading-fortigates-...

First slave unit is upgraded and then the primary unit is upgraded.