While in a call (Audio or video), click the Share button (A)
A new section of the program will appear along the bottom allowing you to choose a window, screen, or file to share
In the top-left corner of this section, check the Include system audio checkbox (B)
Select a window, screen, or file to share with your participants.
Your participants will hear all of the sounds from your computer, including:
- Any audio in your presentation or video
- Audio from your microphone
- Audio alerts and messages from any other program on your computer
- Notifications for new email or instant messages
- Any other audio being played on your computer
- If you can hear it in your speakers or headphones, your participants can also hear it

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