It is possible to increase the number of attendees by hosting a large meeting or, instead of having a meeting, hosting a webinar. Discover the difference between a meeting and a webinar by clicking here.
In the large meeting plan, the addition you can take advantage of is the large meeting add-on, which enables you to hold a meeting for up to 500 or 1000 participants, depending on the license granted. It is up to the host to decide whether to allow participating participants to use audio, video, and screen sharing during large meetings. To learn more about how to order and assign licenses for large meetings, click here.
Up to 10,000 people can participate in a virtual event by attending a webinar which is broadcast simultaneously to ten thousand other people. The risk of disruption in a meeting is reduced, and the choice of this method is a safer one for a large audience of strangers or for people who are unfamiliar with meeting controls, and do not necessarily need to be present on video or audio. Get more information on buying a license for a webinar here.
The add-on Large Meetings or the webinar license is not required to host meetings for fewer than 500 participants. This can also be done without having to pay for the add-on of Large Meetings. Here is more information regarding inviting others to an online meeting.