b. Enter your List ID To find your list's ID, login to your ActiveCampaign account and click on subscriber count link next to the particular list name, you'll then see a url similar to this "http://company.activehosted.com/admin/main.html?action=subscriber&listid=1#list-01-0-1". Your list ID is the number only following the "listId=" portion. In this case, 1.
Justuno will now sync new signups to your selected ActiveCampaign list as they come in!