To join a Microsoft Teams meeting via portal.office.com, start by logging into your Microsoft 365 account. Once signed in, navigate to the Teams app or click on the calendar icon to locate your scheduled meeting. Select the meeting and click the Join button. You’ll be redirected to the Teams interface, where you can adjust your audio and video settings before entering the meeting. If prompted, choose whether to join via the web app or the desktop app. For a seamless experience, ensure your microphone and camera are functioning properly before joining.