Azure virtual WAN (vWAN) is an Azure-managed service that provides automated branch connectivity to and through Azure. You can leverage the Azure backbone to connect branches and enjoy branch-to-virtual network connectivity. Azure regions serve as hubs that you can use to connect your branches to.
This guide explains how to configure FortiOS to connect to Azure vWAN. It also expalins how to access virtual networks in Azure and employ branch-to-branch connectivity.