Buyers can “Allow past due dates on vendor update” from Account Settings --> API Integration. When this setting is enabled, these three screens will allow suppliers to propose dates in the past. This helps suppliers cleanup orders that are past due.
Acknowledge - While responding to new orders
Accept/Propose - While proposing/responding to changes
Split line - While Proposing Split Lines
Non-Cancelable - While Rejecting Buyer Proposed Cancellation
