Summary (TL;DR): Update an open Purchase Order by revising the document to include newly approved order items that share the same vendor.
Prerequisites
You must have Purchaser role permissions.
The Purchase Order must currently have an "Open" status.
The new item must be fully Approved and share the exact same Vendor as the existing Purchase Order.
Part 1: Prepare the New Order Item
You cannot add unapproved items to a Purchase Order. If the item you want to add has not gone through the approval process yet, you must submit it through the standard workflow first.
Navigate to Request > Order to create a new request.
Add the missing item to your request cart.
Ensure the selected Vendor matches the existing Purchase Order exactly.
Submit the request and wait for it to be fully approved.
Note: If you need to copy details exactly from the original request, you can duplicate the previous Order Request and simply delete the items you do not need.
Part 2: Revise the Existing Purchase Order
Once the new item is fully approved and sitting in your Procurement list, you can merge it into the existing document.
Navigate to Procure > Purchase Orders.
Locate and select the existing Purchase Order you want to update.
Scroll down and click the Revise PO button on the right-hand side.
Click the + Order item button located directly above the existing line items.
In the pop-up window, locate your newly approved items and select the checkbox next to each one.
Click Add Item(s) to append them to the document.
Make any final edits to quantities or prices, then click Save Purchase Order.
Important Considerations
Closed Purchase Orders If the Purchase Order has already been closed, the Revise PO button will not be available. You must reopen the closed Purchase Order before you can add new line items to it.
Procurement Access Restrictions If your domain has Procurement Access restrictions enabled, you can only edit Purchase Orders tied to your assigned organizational categories. If you cannot edit the document, ensure your user profile has the correct Location and Department access under your Roles & Permissions tab.