Looks like an adm file will be available for Live Meeting 2007 client and conferencing add-in. The article has been released 948741 here
In order to receive the actual adm file you will need to open a support incident. The process, at least when I was in support, was you opened the case and either paid or incurred a decrement to your support contract but after you get to support they are supposed to reverse that. Make sure you keep the email with your initial connect because it includes their contact information as well as their manager if you need to follow up on reversing charges.