Change Zoom Phone Audio Settings
- Click the profile icon in the top-right of the Zoom app
- Select 'Settings'

- Click the 'Audio' tab on the left
- Make sure that 'User separate audio device to play ringtone simultaneously' is checked and make sure the selected audio device is the built-in speakers of the computer (will probably be called 'Realtek(R) Audio')
- Set the Speaker and Microphone to your headset by clicking the dropdown
