Before modifying quantities and settings, you must assign sources to the products.
Unassigning a source clears all quantity data. Reassigning a source can potentially cause issues with salable quantities, reservations, and pending orders. It is recommended that you process all orders before unassigning sources or making other source changes. You can also use new commands to detect and update reservations. See Inventory Management CLI Reference for more information.
On the Admin sidebar, go to Catalog > Products.
Open a product in Edit mode.
Expand the Sources section.
This section allows you to modify the source, update inventory quantities, and more.
Currently, only Simple, Configurable, Virtual, Downloadable, and Grouped products support multiple sources. Bundle products can be created and managed with only the Default Source and Stock.
To add a source, click Assign Sources.
On the Assign Sources page, select the checkbox next to each source that you want to assign for the product.
Click Done to add the sources.
Do one of the following to save:
After assigning sources, update the inventory quantity for each product source.