Teams stopped making or receiving calls

Hi Marty C

Thank you for reaching out to the Microsoft Q&A forum. I understand that Microsoft Teams (Free) suddenly stopped making or receiving calls, and that the audio and video device dropdowns are inactive, even though the service was working previously.

Please make sure you have already tried the Q&A Assist–recommended steps. In addition, please try the following:

1. Fully sign out of Teams and close the browser or app

• Sign out from the Teams profile menu
• Close all Teams tabs or fully exit the Teams app
• Reopen Teams and sign in again

2. Check microphone and camera privacy permissions at the OS level

• Open system privacy settings for Microphone and Camera (you can use Windows Search if you’re on Windows)
• Make sure the browser or Teams app is allowed to access both
• Turn the permission off, restart the device, then turn it back on

3. Clear Teams site data or app cache

• If using a browser, clear site data specifically for teams.microsoft.com
• If using the desktop app, clear the Teams cache and relaunch the app

4. Temporarily disable other apps using audio or video

• Close any conferencing, recording, or streaming apps
• Restart Teams and check whether the device dropdowns become selectable

5. Test with built‑in audio hardware

• Disconnect external USB or Bluetooth headsets
• Restart Teams and check device availability using the built‑in speakers and microphone

6. Try a different network temporarily

• Switch to another Wi‑Fi network or a mobile hotspot
• Sign in to Teams again and test the calling behavior.

Please feel free to let me know how it goes. I truly appreciate your time and understanding.

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Work through these checks to restore calling in Teams Free on the web:

1. Verify audio device access in the browser
   • In Chrome: go to Settings > Privacy and security > Site settings > Permissions > Microphone.
     • Ensure the correct device is selected at the top.
     • Under Default behavior, select Sites can ask to use your microphone.
   • In Safari: open Preferences > Websites > Microphone.
     • For When visiting other websites, choose Ask or Allow.
   • Then reload Teams in the browser and rejoin a call to see if the device dropdowns become active.
2. Re‑select devices in Teams
   • In Teams, select Settings and more (profile menu) > Settings > Devices.
   • Under Audio settings, make sure a valid Speaker and Microphone are selected from the dropdowns.
   • If they appear but are muted, unmute them.
   • Use Make a test call to confirm that audio works.
3. Check OS sound settings (if using Windows)
   • Open Settings > System > Sound.
   • Under Input, select the correct mic in Choose a device for speaking or recording and ensure Volume is not muted.
   • If the mic is disabled, go to Advanced > More sound settings, open the Recording tab, right‑click the mic, and select Enable.
4. Reconnect or change devices
   • If using USB/Bluetooth headsets or webcams, unplug/re‑plug or re‑pair them so the browser and Teams can detect them.
   • If the device does not appear in Teams’ dropdowns after reconnecting, try another port or device.
5. Test calling again
   • After adjusting browser, OS, and Teams device settings, try placing a call from Calls in Teams and check if it now rings and connects.

If calls still do not work and device dropdowns remain inactive, use Teams in another browser to rule out a browser‑specific permissions issue.

References:

• My microphone isn't working in Microsoft Teams
• My speaker isn't working in Microsoft Teams
• Manage your call settings in Microsoft Teams
• Overview of Teams calls