The Service.StartupType enumerated type defines valid Startup Type for vCenter Server services.
MANUAL : Service Startup type is Manual, thus issuing an explicit start on the service will start it.
AUTOMATIC : Service Startup type is Automatic, thus during starting all services or issuing explicit start on the service will start it.
DISABLED : Service Startup type is Disabled, thus it will not start unless the startup type changes to manual or automatic.
Enumeration: MANUAL, AUTOMATIC, DISABLED,