ALargeItemThresholdPeriod

Optional. This setting is equivalent to the number that you select for Never Archive Items Younger Than on the Archiving Rules tab of the Exchange Mailbox Policy dialog box.

This setting is for the filters that are associated with the mailbox, and it does not apply to other folders.

If you specify ALargeItemThresholdPeriod, you must also set values for all the following:

UseInactivityPeriod (must be set to true)
APrioritizeLargeItems
APrioritizeItemsOver
ALargeItemThresholdUnits

Possible values:

A positive integer