Specifies whether to allow selecting specific power plan owned by Power Manager in the client machine.
If you enable this policy setting, you must input the plan name.
When a power plan is selected and the power plan is not allowed, power plan is switched to an another predefined power plan.
Power Manager searches available power plan in the following order:
* Look for Energy Star (ThinkPad Default) power plan.
* If failed or not allowed, look for Power Source Optimized power plan.
* If failed or not allowed, look for Maximum Battery Life power plan.