Applies to: All products.
Some applications may have restricted access to your microphone.
To address this please open the Settings menu in Windows and look for the Microphone Privacy settings and turn on the option shown here:
Start Menu > Settings > Privacy > Microphone
If you are still having issues after these steps then security access may not be the cause of your issue and another issue may be present. Some of our other Help Centre articles may help to resolve the issue.