Once you install Advance, you need to log into 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://server.yourorganization.com/HdaRoot. If you changed the default RootWebAppName value in the installer settings file, the root application may have a different name.
You are now logged into the root application.