You must register for each service of the High Holy Days you plan to attend. Please DO NOT share your link with anyone else. Only one person can log in with your link - it is unique to you and if you share it with someone else, you will be locked out. Everyone is welcome to register. Rather than sharing your link, share the website with them so they can register themselves.
After you've registered for the first session, Zoom will remember your name and email, so it will be much easier to register for subsequent services.