With the PersistDateTime property, you can query or specify the date and time at which WDP_MODE_PERSIST expires and automatically reverts to WDP_MODE_DISCARD when Windows Disk Protection is turned on. The date type for this property when queried is WBemScripting.SWbemDateTime. Note that the PersistDateTime property has no effect unless the CurrentMode property is set to WDP_MODE_PERSIST.
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| PersistDateTime |