Azure Stack HCI is a virtualisation platform for Windows and Linux virtual machines, and customers have a choice as to how they license the Windows part of the VMs. Firstly, they can bring their own licences, and there’s no Software Assurance required when Azure Stack HCI is running as an on-premises solution dedicated to the customer.
From 1 April 2022 there’s a new option with the launch of special Windows Server Subscriptions specifically to license the guest (VM) operating systems on Azure Stack HCI. As is usual with Windows Server, you license at the physical core level, and a Windows Server Subscription costs $23.30 per physical core per month, with the first 60 days free.
Find the announcement here: https://bit.ly/3LrZXZd, and a useful page comparing the Windows Server licensing options for Azure Stack HCI here: https://bit.ly/3EW9zcz.
One way of deploying Windows Server virtual machines in Azure using the Azure Hybrid Use Benefit is to use a Marketplace image.
This is where you can find the available Bring Your Own Licence (BYOL) images and choose your ideal virtual machine configuration: http://bit.ly/2pLqPKo.
Microsoft announce a new set of Bring-Your-Own-Licence SQL + Windows virtual machine images in the Azure Gallery.
This means that you can use an image to easily provision a Windows VM with SQL Server, and then use existing Volume Licensing licences with Software Assurance to license the SQL part of the VM.
For more details and some useful pictures, see the Microsoft announcement here: http://bit.ly/1Uf54zu.