From Company > Settings >Campaigns you'll find a list of available campaigns.
The Customer Campaign will not work correctly for newer Maid Central users since customers that were imported will not have a "last job date". This campaign also will not work until more time has passed, job punches have happened, and payroll is being closed, which closes jobs and gives them a Last Job Date.
PLEASE NOTE!!! Don't worry, you can still find a list of all your customer's! To send an email campaign to all customers, OR to just generate and export a list of all your customers, go to Company > Settings > Campaigns > Create Account Customer Invite. Once you've generated the list as desired, click on Generate Email. Select from a template you've build, or you can manually type the e-mail subject and content you want to send. Click Submit.