Registration is at 101+ but attendees limited to 100. What will happen to participant 101 +

Hi there,

We have Zoom Pro and can only have 100 per meeting. We have a seminar scheduled and we asked for people to register. We are now at 101. What if everyone ends up attending the meeting, will the last person to join the meeting be unable to attend? What will happen on their end? What are my options before the meeting to make sure we can accommodate everyone who ends up registering for the meeting?

Thanks for the help.