APrioritizeLargeItems

Optional. This setting is equivalent to the Start With Items Larger Than check box 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 APrioritizeLargeItems, you must also set values for all the following:

UseInactivityPeriod (must be set to true)
APrioritizeItemsOver
ALargeItemThresholdUnits
ALargeItemThresholdPeriod

Possible values:

true
false