What to do when the wrong link escapes
A link that has already been forwarded cannot be unsent, and it is better to say that plainly than to pretend the tool will rescue you. What you can do is change what the link leads to. Generate a fresh meeting address in the platform you present on, replace the one you pasted into the page with it, and send the updated address out to your registered list as a broadcast โ the list is segmented, so the correction goes to the people who signed up rather than to everyone who ever clicked.
The seat limit does the rest of the work. New registrations still stop where you capped them, so a leaked link brings strangers to a door you can shut, not an unlimited hole in the room. Fixing a leak is a two-step habit rather than an emergency: rotate what you control, then re-send to who you know.