Azure Stack HCI

Azure Stack HCI is a series of Windows Server-based operating systems, initially released in December 2020 after being announced on 21 July 2020. It is a modified version of the Windows Server core edition intended for hyperconverged infrastructure integration with the Microsoft Azure cloud service. It replaces the free Hyper-V Server SKU that was available in previous versions of Windows Server prior to Windows Server 2022.

Servicing model
Azure Stack HCI uses an update model similar to Windows as a service, where Microsoft would release feature updates to the operating system after a yearly development cycle. Updates are delivered to the operating system on a monthly cadence.