You can now use this option to prevent purchase orders from being entered for vendors before they are added to the Accounts Payable program.

If you allow non-existing vendors, you can add transactions in Purchase Orders before adding the vendor in the Accounts Payable program, but you must use the same vendor code when you add the vendor in Accounts Payable, and, in a multicurrency system, you must specify a tax group that matches the vendor's currency.

Finally, you must add the vendor in Accounts Payable before you can post the invoice in A/P.