A product or variant can be linked to multiple suppliers, with one supplier set as the default.
When you create a backorder from a sales order, the system will automatically select the default supplier in the proposed purchase order. You can still change to another supplier if you need to.
How to set up a default supplier
Step 1: Set the default supplier for a product
When creating a product, select the default supplier in the Default Supplier section.
If the product already exists, click Edit Product and add or update the default supplier.
Step 2: Create a purchase order (backorder) from a sales order
When a sales order includes items that need to be backordered, click the Purchase button and select Purchase Items (Flexible).
The system will generate a proposed purchase order with:
The required quantities
The default supplier (if set)
If a product does not have a default supplier, you can select one manually.
You can also tick Set as Default Supplier to save it for future use.
Once everything is confirmed, click 'Create PO and Receive Note' to proceed.