To show the Zoom URL field on the reservation form and the reservation record page, you need to take the following steps:

Steps:

  1. Go to Setup - Object Manager and find the Reservation object.

  2. Go to Page layouts - there drag the Zoom Join URL field to the page layout and save.

  3. Go to Field Sets - Add the Zoom Join URL field to the field set that you are using on your reservation type and save.

As a FYI; The “Zoom Start URL” field also exists, this is added for possible future extensions of the Zoom App. For now you can just use the “Zoom Join URL”