How to create a Weebly website on a subdomain?
To use Weebly with a subdomain you should set this subdomain as the main domain for a separate website.
To do this, go to Client Area > Websites > Add New Site, click on the “Select” button for “Existing domain” and then input the subdomain which you want to use.
Click on “Continue” and then, follow the steps for Weebly Sitebuilder activation to finish the process of site creation.