Azure FortiGate Active-Passive HA - VM license version

I've been under the impression that in Azure, the VM02 = 2 interface and the VM04 = 4 interfaces which meant that you needed a VM04 in order to do HA in Azure. Am I totally wrong on this one? I have a feeling you can add additional interfaces to a VM02 but don't have an environment I can test it in right now.

Thanks!