Sign in to SharePoint. SharePoint is a browser-based app that you connect to through your web browser, like so: Go to office.com, and sign in to your work or school account. In the upper left corner of the window, select the app launcher > All apps > SharePoint.

Select Start > Settings > System > Sound. In Input, select the microphone that you want to test. In Input settings, look at Input volume while speaking into the microphone. If the bar moves while you speak, your microphone is working properly.