126.96.36.199 PidLidToDoOrdinalDate Property
This property SHOULD be used to determine the order of objects in a consolidated to-do list. If the client allows a user to reorder tasks within the consolidated to-do list via dragging or other mechanisms, the client can use any suitable algorithm to determine the new value of this property such that the task appears in the correct place when this property is used as a sorting field. When this property is used to sort objects and two or more of the objects have the same value for this property, the objects with the matching values will tie for placement in the list. In this case, the PidLidToDoSubOrdinal property (section 188.8.131.52) is used to break the tie.