Use Zoom's new closed captioning feature (recommended)
Zoom now supports closed captions and live transcription natively. For the best results in adding live captions to your Zoom meeting, and due to an issue with Zoom's captioning API, I now recommend you use Zoom's closed captioning feature instead of the Zoom channel in Web Captioner. Learn more about setting up closed captioning in Zoom.
Old method (not recommended)
If you have set up Web Captioner to send captions to Zoom, by default, you will only see captions for your own voice.
If you would like to instead show captions for anyone else in the meeting, follow the steps to caption audio from another program.
If you want to show captions for both your voice and everyone else in the meeting, follow the steps to caption audio from another program and your microphone at the same time.