This chapter presents the following topics: Introduction PAL and DPOR registration for Azure Stack Install roles and featuresDeployment and configuration of a Windows Server 2016, Windows Server 2019, Windows Server 2022, or Azure Stack HCI operating system version cluster requires enabling specific operating system roles and features. Configuring a cluster witnessA cluster witness must be configured for a two-node cluster. Microsoft recommends configuring a cluster witness for a four-node Azure Stack HCI cluster. Cluster witness configuration helps maintain a cluster or storage quorum when a node or network communication fails and nodes continue to operate but can no longer communicate with one another. Deployment prerequisites for stretched clusters Customer network team requirements Design principles and best practices Validated network topology