About hypervisor maintenance mode

A hypervisor in an active state runs the virtual machines. These virtual machines run the business applications and services. When you place a hypervisor in maintenance, all the virtual machines running on this hypervisor are migrated to other available hypervisors in the cluster with high availability.

A hypervisor in maintenance state does not run virtual machines and allows the server administrator to perform updates on the hypervisor, server hardware, or both, preventing business downtime.

After the maintenance operation on the hypervisor host completes, you must release the hypervisor from maintenance mode to make it available for scheduling.