If you want to make someone an owner or view who’s an owner of an existing team, go to the team name and click More options > Manage team.
The Role column tells you if someone is a team member or owner. To make someone an owner, click Member and then select Owner.
You can also make someone a team owner while you’re creating a team. When you’re adding team members, designate whether each new person is going to be a team member or team owner by clicking Owner under the Member menu.
This information was compiled using information courtesy of © Microsoft 2020. All rights reserved.