Once you install Advance, you need to log in to the Advance root application to create a tenancy. You will also use the root application whenever you need to edit a tenancy or manage tenancy administrator users.
The URL for the root application typically looks like https://hdroot.yourorganization.com/. If you changed the default RootWebAppName value or default RootSubDomain value in the installer settings file, the root application may have a different name.
You are now logged into the root application.