Due Date on a Purchase Order

Hi,

We are in Peoplesoft 9.1. It appears that the Due Date field on a PO is always populated (based on Lead Days logic of item/category) even if the Due Date on a Requisition is empty.

Is there any scenario whereby the Due Date can stay empty?   We want it to always be populated, but am just trying to see if there is a way around it, which we would want to prevent. Trying to avoid a customization if possible.

Thank you

Peter