QPrioritizeItemsOver

Optional. This setting is equivalent to the Start With Items Larger Than size entry 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 QPrioritizeItemsOver, you must also set values for the following:

UsePercentageQuota (must be set to true)
QPrioritizeLargeItems

QPrioritizeItemsOver is not valid for public folders.

Possible values:

An integer that specifies the size of items in KB to which you want to give priority.