In order to pull up a list of your customers as well as the appliances associated with them, first, open the 'Reporting' tab.
From here, click the menu button (three horizontal lines) and open 'Customers' and then 'Appliance details'.
You can use filters to narrow down the results or you can click the pencil to edit the columns within this list:
You can also use 'Quick links' to save the setup/configuration of filters on this report to access it quickly and easily in the future.