For the addition of multiple integrations to an opt-in form, follow the few easy steps mentioned below.
Step 1: 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 the Change Account link under MailChimp Settings, and then click on the ADD NEW INTEGRATION button.
Step 3: Click on your preferred Email Marketing Service logo, and follow the process to set up the Integration.
Step 4: You can also delete the integration added prior to this by clicking on the trash icon.