I installed firmware 15.6 and had IKEv2 enabled by support. Created a route base vpn gateway in Azure and added the site to site IPSec connection to the Meraki. Setup the Meraki side to connect to the Azure gateway. Basically setup the same way as if I was doing a policy based tunnel. I don’t have an NSG or route table on the gateway subnet. I can’t get the tunnel to connect. When I run the network watcher it says check for NSG etc..
Actually we did get it working. the best way to do it setup the vpn tunnels before updating to the latest beta software. After you update to the Beta software you can call support and tell them which tunnel needs IKEv2.