Supplier orders can be sent to the supplier either directly from the overview of all supplier orders (Purchasing → Supplier orders) via the respective context menu, or from within the supplier order itself using the arrow at the top right next to the Edit button.

You can download your supplier order as a CSV or PDF file and send it using an external email program, or you can use the Send to supplier button to send it directly from the Shopware Admin via email to the supplier. In this case, the order is automatically uploaded as an attachment in PDF or CSV format. The email is then sent from the shop operator's email address.

You can find more settings related to the documents for supplier orders as well as the email to the supplier here.

After you send your supplier order using the Send to supplier option, the order status automatically changes to Sent to supplier. If you don't send your supplier order directly from the shop, you can manually adjust the order status in the supplier overview. If you have received a confirmation of receipt from your supplier, you can also set the order status to Confirmed. In this case, the Delivery date field is set based on the default delivery time of the respective supplier.

You can find out how to process incoming supplier orders here.