Final answer:
The best join options for a user with the MS Teams app already installed are the desktop app, mobile app, or web app.
Step-by-step explanation:
The best join option for a user with the MS Teams app already installed is:
- Use the desktop app: This option provides the most comprehensive and feature-rich experience. It allows users to access all the functionality of MS Teams, including screen sharing, file sharing, and access to all meetings and channels.
- Use the mobile app: If the user is unable to join the meeting from their desktop, using the mobile app is a good alternative. While it may have some limitations compared to the desktop app, it still provides the essential features needed to participate in the meeting.
- Use the web app: If the user doesn't have access to the desktop or mobile app, they can use the web app to join the meeting. However, this option may have more limited functionality compared to the desktop and mobile apps.