Changing a meeting from registration required to public after people have registered

Hi, I was having a problem with people accessing/receiving confirmation emails for a registered meeting I have set up. To combat this I have changed the meeting type back to public, so I can easily send the link out. Do you know if the meeting link will stay the same and those who have already registered will be able to access the meeting using the details from the confirmation email or does the link change!?

Thanks in advance for any help.