We typically remove the form from the registration page and replace it with a message explaining that registration is full. There may be other/better ways to do this in an automated way.
There is no out of the box functionality for this. If its very important to cut it at a specific number you would need some type of third party integration and I think @Sanford Whiteman might have a product that could do that.
It's been on and off the roadmap for years. I think the PMs have put this in the too hard basket seeing as there's a lot of third-party solutions out there. But please everyone keep voting on the idea. I raise this at every Summit in the roadmap Q&A session just to annoy the new breed of product managers. (Hi guys!)
I had a client need to do this recently and we were able to come up with a not perfect, but workable solution for automating it.
We created two tokens: one for the current count of registrations, and one for the maximum count of registrations. Every time the form was submitted, +1 would be added to the count of registrations token value, and every time the page loaded, it would run a piece of script that looked at whether the count of registrations was the same as or greater than the maximum. If so, it would redirect to a waitlist page.
For many reasons, not a perfect solution, but if you've got some developer resource and the holes aren't too risky for you, it could work. For our clients use case - fairly low volume of traffic, mostly directed to internal staff - it was worth testing (I will note that the program hasn't yet run to completion so we don't have feedback yet on how well it worked and whether they'll use that solution again).
Anna, Marketo Professional Services also offers an "Event Cap" solution. It will redirect to an 'event full' or an 'wait list' page when the capacity has been reached. If interested, you can reach us at services at marketo dot com.
I registered for an event recently that didn't automatically approve everyone. You filled out a form and got a confirmation that you'd requested registration, and that they'd let you know in 2 days if your registration was accepted. Then I got an email saying I was accepted, giving me more details and inviting me to actually register. So that's one way to do it. It will also allow you to review registrants and exclude junk submissions or other undesirable people.
Amy GoldfineMarketo Champion & Adobe Community Advisor
And I dunno, even doing manual/offline approval still requires that you maintain a counter, it just adds additional criteria. (The 50th approved registrant still needs to cap regs.)
No it was a GDPR seminar. I'm not sure what their reasoning was for not accepting everyone. Then again, when we do roadshows, we always get a handful of students and other people who we would rather exclude!
Amy GoldfineMarketo Champion & Adobe Community Advisor
A
Anonymous
February 1, 2018
This old thread on the community provides multiple solutions for 'cap registrations'. We have done it several times. Marketo web hooks allow you to do it very easily.