To add new products to multiple stores at once you will need to go to the BevJournal. Here you can use the Add To column to select which stores will have the product added to your account. This column is activated after your CobaltConnect support specialist has confirmed your multi-location feature has been activated.
You can not accept purchase orders within the multi-location module. To accept purchase orders you will need to go into the account that the purchase order is associated with.