Article 12/19/2023 Applies to: Azure Stack HCI, versions 22H2 and 21H2 This article describes how to install, monitor, and troubleshoot updates on multi-node clusters. To update single-node clusters, see . When updating Azure Stack HCI clusters, the goal is to maintain availability by updating only one server in the cluster at a time. Many operating system updates require taking the server offline, for example, to do a restart or to update software such as the network stack.