How to Change Your Default Output Device
If you have multiple audio outputs connected to your computer (external speakers, speakers in monitor, speakers on webcam, headphones etc), Windows will choose the best output device for you. Unfortunately that means that your sound might not come from the correct device. Such as if you had headphones plugged in, but sound is coming from the laptop. A quick double check BEFORE a Teams call or important meeting can save you a lot of frustration. To change your default playback device follow below:
Right click the volume icon on your taskbar.
Click "Open sound settings".
Click the dropdown menu under "choose your output device" to see your available options.
Once you choose your preferred device, you can drag the volume slider under "master volume" and release to hear a test sound. Verify the ding sound is coming from the correct device.
More info: How to Confirm Your Playback Devices from Teams