Whether you have imported products from an extranet or created them manually you can then map to those products if you decide to connect more extranet accounts.
This allows for you to have multiple extranets connected to one product instead of creating duplicates of the same product.
Navigate to the Connections tab under the Distribution menu and click on connect on the account you would like to add. You will then be prompted to enter your extranet credentials and click on create connection.
On the accounts connection screen you will see a list of products with the options to map or import.
Click on the Map Now next to a product
You will then see a pop up window where you can select which product you would like to assign to then click on Update Mapping.