For distance communication and collaboration, with hundreads of lisseners, such as classes, tutorials, webinars, work meetings, the Colibri platform, made available by the FCCN, is recommended.
For more details you can consult the information provided in Videoconference Classes.
Técnico has also 1 Zoom Pro license, with 100 participants and 1000 webinars atendees. The main use is large communication meetings using webinars. Needs calendar free dates.
Those are the main differencies between a webinar and a meeting.
Can be asked, in advance, to email@example.com pointing the goal of meeting, dates, and email to connect.