Zoom Events Reminders and Event Login

Hello! I'm using Zoom Events for a private upcoming Summit. The registration was done through a third party and I'm uploading the registration list. Currently, we are working on the event reminders and day of login. What is the reminder and day of the login process like? How do I share the link with invite-only attendees? Is there one event link? Or, do we send personalized reminders to each participant? Would love anyone's experience and advice. Thank you!