A system administrator can place a vApp in maintenance mode to prevent non-administrator users from changing the state of the vApp. This is useful, for example, when you want to back up a vApp using a third-party backup solution.
When a vApp is in maintenance mode, non-system administrator users cannot perform any actions that modify the state of the vApp or its virtual machine. They can view information about the vApp and its virtual machines and access the virtual machine consoles.
Placing a vApp in maintenance mode does not affect any currently running tasks that involve the vApp.