Another advantage of XenToolBox against other Xen administration tools is the possibility to manage the boot order of virtual machines, establishing a specific delay for each one, if it was necessary. In this way we can ensure that the boot time of each machine, it will have all the resources and services they need, and they have been enabled during the delay assigned to the machine.
The XenToolBox auto-boot overrides auto-start implemented default by Xen. So, including a VM on a boot priority planning, the auto-start implemented is desactivated. Similarly, when you delete a VM from a priority boot configuration by XenToolBox, the auto-start set of Xen re-enable.
It´s possible to deactivate the auto-run function. The boot configuration that is set at that moment, will be recorded, so that when it is activated again, the setting will remain the same.