Hi TJ,
MRP type = X0 means the product will be planned in APO, not planned in ECC. Other MRP Type e.g. PD can be planned in both ECC and APO.
The planning time fence can be mapped to APO system. In APO product master, "PPDS" tab, you will see the planning time fence. And this planning time fence can be customized in APO system too.
Regards,
Claire