A check mark in this field indicates that an expiration date assigned to the item tracking number as it entered inventory must be respected when it exits inventory.
This field is mostly used together with the Man. Expir. Date Entry Reqd. field, which gives a system message if you forget to define the expiration date upon entering inventory.
If you do not checkmark that field, the strict posting principle will use work date as expiration date on the inbound item tracking line in question.