Client created a PO with many Detail lines, from Vendor #1. After we Posted the PO, we realized that the whole PO should have been entered referring to Vendor #2.
Nothing yet had been received.

I figured that the easiest way to make the change would be to go into the Order and simply change the Vendor code on the Header tab – “Vendor XXXXX used but not defined” message.
So this does not work.

Next I figured that we would use the COPY button on the PO’s main screen, and then change the Vendor Code in the Header. Same problem.
So this does not work either.

We finally got it to work by editing each Detail line and one-by-one, changing the Vendor Code.
We then changed the Vendor code on the Header, and finally Posted the Order.

Note that this is a busy office, a lot is going on and it is not unusual that mistakes may happen. So we need to be able to make edit changes when needed.
Our question: Is this the way that we should make this change to the PO?
Is there not a quicker way to update the Vendor on the PO and all the Detail lines more efficiently?