How to Handle RMS PO Backorders... When Hooked Into Quickbooks Ac

Can someone tell me how they handle BACKORDERS when handling your PO's in RMS? Do you leave that PO open until you get every single item in? Or, if a long enough time goes by, do you close out that PO?

If the PO BO's come in later, do you create a new, little PO to accomodate them?

I understood that QB takes the PO at EndOfDay after the PO has been officially, fully received and closed?

Thanks for helping me,

D.