Click on Customization, then on the Subplatforms tab. Enter the initial domain you want to use (mycompany.skyprepapp.com) and click on Add Subplatform.

You may see a page prompting you to switch plans. If you do, just remove the portion of the URL after the .com portion.

Once done, your subplatform is ready! You can change your domain, and also share courses between your platforms.

If a user is an Admin in both the parent platform and a subplatform, they will be able to sign into the subplatform by clicking on it in the Single Sign-On section on the Dashboard. However, this will not work if trying to navigate from a subplatform to the parent platform.