Firming planned orders by adding lines to an existing order in Microsoft Dynamics AX

For Purchase orders and Transfer orders, we have a very handy functionality in Dynamics AX's Master Planning that has been there since the beginning: While firming a planned order, add it as a line to an existing order.

Add to existing Purchase orders

The surprising news is that for planned purchase orders, I can select from a list of existing Purchase orders for any vendor and in any status.

The field "Purchase order number" allows selection of an existing Purchase order to ‘firm to'.

• The firming will ignore the vendor on my planned Purchase order.
• I can add to Purchase orders in any status except the workflow status "finalized."*
• When I use the approved vendor list, I will get a warning when the vendor-item combination is not approved.