The account domain that you create is the URL that an influencer will see when they are applying to join your influencer program via a landing page or their Live URL.
If you would like to change your account domain begin by going into your landing page settings.
Once inside your Landing Page settings, go to Step 2: Page Basics
Then, enter in the domain in page URL.
Keep in mind that the same account domain will appear for each landing page created, If you have multiple landing pages for different brands. The account domain will appear in each page URL..