Your Organization name, also known as your account name, is visible to all your customers. It is printed on reports, and in the CompanyAccountName field. It is also used as the URL for your Portal Sign in page, and your Method domain.
You can change your Organiztion name and your URL within your account settings under Display.
Click your Profile icon in the upper-right and then click Account Settings.
In the Account Settings menu, click Display.
Scroll down to Organization. You will be able to change your Organization name and URL.