Click "Join now" on the Microsoft Teams Application to join your meeting.
Go to the power point presentation you want to share on your teams meeting, in the power point presentation, click "Present in Teams".
Back in your teams meeting, you will get asked to present your power point presentation, click "Present".
Your Power Point will start presenting to everyone in the meeting at this point.
This feature will only share the power point presentation and not your screen.
Once you are done presenting click "Stop sharing".
Once you the click stop presenting button, a notification will pop up asking if you want to stop presenting, click "Stop presenting".