On your intercompany partner, you can set up if the Supply Company should be allowed to change quantity on a sales order.
This is what happens in the video
If that is the case, then I can on my sales order here in the supply company. I can reopen the sales order, change quantity on a line, release the order again. And now the change of quantity has been sent to the sales order in the sales company.
I can just go back to the sales order here in the sales company, and just update the page, and now you can see the quantity has been changed. Whether or not you’re allowed to do this is controlled on the intercompany partner in the supply company.