To decommission a stretched VMware vSAN cluster and convert it to a standard vSAN cluster, you typically need to: Remove the Fault Domain configuration to effectively treat all nodes as a single Fault Domain; delete the witness host VM, as it is specific to the stretched cluster configuration; and disable and remove the stretched cluster configuration itself. Reinstalling ESXi hosts, removing the vSAN partition schema, or repairing cluster objects are not standard steps for this specific process.