ECC rescheduling compared to BOP when user is in the sales order

Hi All:

If the user is in the sales order and if BOP (Backorder Processing) job that is triggered from APO tries to update the sales order, the update will fail. Is this the same behavior with respect to ECC rescheduling. That is, if the we are running ECC rescheduling (V_V2 for example), and if the user is in the sales order, will the update fail similarly?

Thanks,

Satish