Hi there,
I am an independent advisor and a Microsoft Teams user like you, and I would be happy to help you out with this.
You may receive a full message when the limit is reached. Depending on what kind of meeting, there is a different limit.
For Meetings and calls, there is a maximum limit of 250 people in one meeting.
However, if you do a Teams live event, you could have a maximum of 10,000 attendees.
This documentation shows the limits and specifications of Teams:
https://docs.microsoft.com/en-us/microsoftteams...
Teams will show the most recent 4 speakers in a video call, however Microsoft is working on increasing the number of participants shown.
I hope this has helped you. If this is not what you are looking for, please reply and let us know and we would be happy to look into providing some different suggestions!
Regards,
-Ashton