You can shut down a management VPLS without deleting the service parameters.
When a management VPLS is disabled, all associated user VPLS services are also disabled (to prevent loops). If this is not wanted, first unmanage the user VPLS service by removing them from the managed-vlan-list.
config>service
vpls service-id
shutdown
config>service# vpls 1
config>service>vpls# shutdown
config>service>vpls# exit