I would like to insert some field values automatically on the meeting booking form. Now for "normal" forms it is quite easy: https://www.domain.com/contact?firstname=John and then the firstname field is filled in on the Hubspot form on that page.
However, that doesn't work on the meeting booking form. Any idea as to how I can achieve the same result on a meeting booking? It doesn't have to be via a query string, just any way I can pre-populate field(s) in the meeting booking, when sending traffic to the page from an external website?