You can check the hardware Microsoft Teams has detected and is using as shown below.

Click on your profile picture on the top right hand corner of the Teams Window

Click on "Devices" on the left hand side.

You can see what devices are being used under the titles.

If nothing is shown, please ensure that the devices are connected properly. It may be worth removing the device from the computer and inserting it again, just in case. Failing that, try restarting your computer.




Make a Test Call


To make a test call, select your profile picture at the top of Microsoft Teams,
then Settings > Devices. 

Choose Make a test call under Audio devices. 


In a test call, you'll see how your mic, speaker, and camera are working. Follow the instructions from Test Call Bot and record a short message. The message will play back for you. After that, you'll get a summary of the test call, and you can go to your device settings to make changes.