Due to the fact that anyone with a student or employee role can create a team, we enabled a Team expiration policy. Every 90 days a team with no activity will go through the expiration policy process. The owner(s) of the Team will be emailed asking if their Team should be renewed. If they respond, the Team is renewed for another 90 days. For this reason, we recommend that your Team have at least two owners. https://docs.microsoft.com/en-us/microsoftteams/team-expiration-renewal
