Today, anyone within an organization can do a Teams meeting, regardless if they are the meeting organizer or not. Moving forward, this will be restricted to only those users who have been assigned a policy to create a meeting within their organization. Meeting attendees without the ability to create a meeting will see a pre-join screen indicating that the meeting hasn’t started. These individuals will be automatically admitted into the meeting once a user with permissions joins and starts the meeting. For example, where teachers are assigned a policy that enables them to create meetings, but students are not: if a student clicks on a Teams meeting not yet started by a teacher, they will be admitted into the meeting once a teacher has started a meeting.