If you’re using a wireless microphone or headphones, ensure they’re fully charged, and use the physical mute buttons on them to check if either device is muted or not.Check whether your internet connection is working as this could prevent you from receiving good audio during a video or voice call.If you knowingly or unknowingly installed such a program, check installed software and uninstall or disable the program.
Reopen the app and make a test call to see if the problem has been resolved Unfortunately, it isn’t clear if the issue was because of Microsoft’s new update as many apps are behaving weirdly on Apple’s new macOS Catalina.