You can access your audio settings and test your audio when you are already in a meeting.
To test your audio, navigate to your audio settings before or during a meeting: Click Join with Computer Audio to join the test meeting with the selected microphone and speakers.Click Join with Computer audio to exit the speaker and microphone test.If you don't hear an audio replay, use the drop-down menu or click No to switch microphones until you hear the reply.If you don't hear the ringtone, use the drop-down menu or click No to switch speakers until you hear the ringtone. Click Yes to continue to the microphone test.
If you haven't enabled the setting to automatically join by computer audio, you can test your speaker and microphone before joining a meeting: