The following steps will let you sync all members from your Dashboard to a Mailchimp list:
1. Click on the 3 horizontal lines in the top right corner of your screen to access your settings.
2. On the side bar select ‘Settings’ from the list.
3. Click on the 'Integrations' tab.
3. From here, you will see your Mailchimp settings. Click the grey 'Sync' button underneath these settings.