1. Log in to the Cloud Marketplace.
  2. Click Classic Panel on the top-right of the screen. 

  3. Click Billing on the top-right of the page.

  4. Click on Orders under the Operations section of the left-vertical navigation pane. 

  5. Find the Order using the various search parameters available in the page. Once it is located, click on the Order ID in the search results.

  6. In the Orders page, click on the Attributes tab.

  7. Click on the Edit button.

  8. Enter the PO number in the field - PO Number and then click Save. 

  9. The PO number will be saved to the Order details.