To enter that menu go to: My_site_name/wp-admin/reseller.php
In first section contains SEO and contact information. It is important to add contact e-mail, you also need create request (in ibuildapp support) to add this email to the service (or we can't guarantee mailing functions on reseller site and apps).
In second section you may add Social applications, it need to provide social integration for site and apps.
Don't forget to press "Save" button.