In ApprovalMax, Purchase Order numbers are not generated by ApprovalMax but assigned by your connected accounting system once a Purchase Order has been fully approved and sent through.
Purchase Order numbers are assigned automatically by Xero when the Purchase Order is fully approved in ApprovalMax and sent to Xero.
The numbers ascend incrementally (e.g. PO-001, PO-002, PO-003, etc.). So, the first Purchase Order you send to Xero will be PO-001 by default.
Important Note: Deleting a Purchase Order in Xero will not reset or reuse its number. Xero and ApprovalMax maintain a continuous sequence, so any gaps created by deletions are skipped.
For example:
You create and send Purchase Orders numbered PO-046 to PO-049.
You delete PO-047 in Xero.
The next Purchase Order created will be assigned PO-050, even if there is a gap.