Microphone and camera have suddenly stopped working on Teams

Question

My microphone and camera have suddenly stopped working on Teams. I wondered whether this is a permissions thing, as it happened after a Zoom call, but I have checked and all permissions are correct. I have tried un-installing, re-installing by update, etc, etc, all known fixes I can find, but nothing has worked. Please help?

Answer 1

Hi @Bu Hayee,

Thank you for posting your question in the Microsoft Q&A forum.

I understand how disruptive it can be when both the microphone and camera suddenly stop working, especially after you’ve already gone through reinstalling the app and trying the usual troubleshooting steps. I appreciate you taking the time to test those common fixes first.

That said, since this issue started immediately after a Zoom call, it’s quite common for another application, or even a background Zoom process, to still be holding on to the camera or microphone. When that happens, Teams may not be able to access those devices correctly, even though everything appears fine at first glance. For this reason, it’s worth rechecking the steps below in a specific order to ensure all resources are properly released and reinitialized.

• To start, please fully quit both Zoom and Teams (not just close the windows), and then restart your device. Make sure Zoom is also closed from the system tray or menu bar before rebooting. This step is important because a simple restart forces any lingering processes to release control of the camera and microphone.
• Once your device is back on, open Teams and manually re-select the correct microphone and camera under Teams > Settings > Devices. Even if the correct devices appear selected already, explicitly choosing them again and running a test call (if available) can help refresh the connection.
• Next, double-check your operating system’s privacy permissions. On Windows, confirm that microphone and camera access are enabled at the system level, and that Microsoft Teams is explicitly allowed in the app list. Even when Teams settings look correct, OS-level permissions can still block access in the background.
• After that, if you’re using Windows, consider disabling Exclusive Control for the microphone. You can find this under Sound settings > Recording device > Properties > Advanced. Unchecking this option can prevent one application from “locking” the microphone and blocking other apps from using it.
  
• If the issue persists, clearing the Teams cache and signing in again is strongly recommended. Cached device or configuration data can sometimes cause problems that remain even after reinstalling the app. You can follow the detailed guidance here: Clear the Teams client cache.
• As an additional check, please try using Teams on the web. If the microphone and camera work correctly in the browser but not in the desktop app, that strongly suggests a local client or cache-related issue rather than a hardware problem.
• Finally, it’s a good idea to confirm that the devices work at the operating system level. Test the camera using the built‑in Camera app and verify that the microphone is detected in system settings. If the devices don’t work there either, the issue is more likely related to drivers, the OS, or the hardware itself, rather than Teams.

Also, if you’re using a work or school account, there may also be organizational policies or endpoint security settings that restrict camera or microphone access. In that case, involving your IT administrator or asking them to open a support request on your behalf would be the best next step.

Your IT admin can create a support ticket by sign in to the Microsoft 365 Admin Center following steps from this link: Get support - Microsoft 365 admin | Microsoft Learn to raise a support ticket from admin center or calling the phone support to contact Microsoft Support: Customer service phone numbers - Microsoft Support.

Alternatively, you can look for the way to find your admin through this link: How do I find my Microsoft 365 admin? - Microsoft Support.

Note: As a community moderator, I ask for your understanding that my access to internal development details is limited. My main task is to guide users to the appropriate resources and support channels. Although I have no influence on product design decisions and have limited insight into internal developments, I'll continue to do my best to support you as much as I can.

I hope this information helps move things forward. Please try the steps above and let me know how it goes. If you run into any issues, I’d be happy to work with you to resolve them.

Thank you very much for your patience and understanding. I look forward to continuing the conversation.

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Answer 2

If your microphone and camera have suddenly stopped working in Microsoft Teams, it could indeed be related to permissions, especially if the issue arose after using another application like Zoom. Here are some steps you can take to troubleshoot the problem:

1. Check Permissions: Ensure that Teams has the necessary permissions to access your microphone and camera. You can do this through your operating system's privacy settings.
2. Browser Permissions: If you are using Teams in a web browser, make sure that the browser has permission to access your microphone and camera. Sometimes, permissions can be denied or reset after using other applications.
3. Device Manager: Check if the microphone and camera are recognized in your device manager. If they are not listed, there may be a hardware issue.
4. Reboot: After making any changes to permissions or settings, reboot your device to ensure that all changes take effect.
5. Check for Updates: Ensure that both your operating system and the Teams application are fully updated, as updates can sometimes resolve compatibility issues.
6. Registry Key: If the problem persists, you might consider modifying the registry key that controls how Windows handles video capture devices. Disabling Frame Server Mode can help resolve issues with webcam or microphone functionality in Teams. However, be cautious when editing the registry and ensure you follow proper guidelines.

If these steps do not resolve the issue, you may want to consult with your IT department or Microsoft support for further assistance.

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References:

• The microphone or speaker status is Unhealthy
• The speaking participant doesn't grant the microphone permission