What happens to a link created in a basic account if that account is then upgraded to pro?

I have a Zoom basic account. I'm providing some training in September and the client has requested I use Zoom. The client would also like the link to the meeting provided now (July) for their internal systems. If I provide that link now (July) and then pay the monthly price to upgrade to a Pro account in September will the original link still work and will that September meeting have all the Pro features?