- Microsoft Teams should now be open.
 - From the top-right, select the Profile menu.
 - Choose the choice for Settings.
 - From the left menu pane, select Devices.
 - Select the microphone you want to use from the Microphone drop-down box under the 'Audio devices' section.
 - To ensure that the microphone is working, click the Make a test call button.
 - The microphone should now operate properly with the Teams app after you've completed the procedures.