For the addition of multiple integrations to an opt-in form, follow the few easy steps mentioned below.
Step 1: Click on ACTIONS, and select the Edit option from the drop-down menu to access the Integrate step of your MailMunch opt-in form in question.
Step 2: Click on Change Account under MailChimp Settings.
Step 3: Click on the Add New Integration option.
Step 4: Click on your preferred Email Marketing Service logo, and follow the process to set up the Integration.
Step 5: You can also delete the integration added prior to this by clicking on the Delete button.