Participants limits / temporary upgrading

marcoa20613636  wrote 1) are the host and the presenter counted in the number limit of the 25 participants?

Yes they are. That is a total of 25 attendees in the room at any given time.

marcoa20613636  wrote 2) in case of, say, a meeting of 30-35 participants, do I have mandatory to switch to the webinar manager 100 plan or can I just buy a few more participants slots?

No, there are plenty of alternative licensing options. You can reach out to any of the resellers found here, Adobe Connect | Strategic Partners . Most of the licensing options are only available through resellers of Adobe Connect.

marcoa20613636  wrote 3) in any of the two cases, Is it possible to switch back to the previous 25 participants plan without losing the account settings (meeting rooms, uploaded materials, recordings etc.)?

You can change licensing plans without losing your account content and settings. However, moving from a reseller purchased account back to and Adobe.com account may be difficult. However, I believe you can find that you can get a more capable license from a reseller than you can from Adobe's website.