Your Account URL is the link that your users will use to access your LMS. You may customize your account URL by choosing a subdomain on the Account Settings page. Please note that only the Account Owner may make this change.
Go to the Account Settings page
Click Settings in the left side navigation bar.
Scroll to the ACCOUNT URL section.
Click the Change url button to choose a different subdomain.
The Edit URL window will pop up. Type in your new subdomain and click the Update button. If you change the account URL, it will be updated immediately and the old URL will no longer work. You will need to notify all of your users of the change.