Follow the steps below to complete the synchronization with your newsletter service in AiX. The user is subscribed in the following cases: registration form, user update, follow-up message, subscribe message, email shortcode.
Marketing > Contacts (https://mc.sendgrid.com/contacts), then click on a list, or create a new one. The last part of the URL is the list ID. Ex. https://mc.sendgrid.com/contacts/lists/8558c1e7-3c99-4428-a68f-78df2e437f8e (the list ID is 8558c1e7-3c99-4428-a68f-78df2e437f8e).Settings** from the top right profile menu. Click Create Additional API key (https://elasticemail.com/account#/settings/new/create-api), set a name and choose Plugin or Full access, or Custom and make sure the permission Contacts is set to View & Modify.Key, enter in Campaign Monitor, then click Account settings from the top right profile menu. Click API keys > Generate API key.List ID, enter in Campaign Monitor, then click List and subscribers from the top menu. Select a list and then click **Settings** from the left menu and copy the List API ID.