NO SOUND when in teams

Hi @Darren Baker,

Welcome to Microsoft Q&A forum.

Thank you for reaching out and sharing your concern. I tried to reproduce the microphone issue on my side but could not trigger it.

This symptom is commonly caused by microphone permissions, wrong input device selected, another app holding the mic, device routing issues, or Teams muting audio when it detects another Teams device nearby.

To resolve the issue, please follow these steps:

1. Set microphone permissions at Windows level

Go to:  Start > Settings > Privacy & security > Microphone 

Then: 

• Turn Microphone access > On 
• Turn Let apps access your microphone > On 
• Turn Let desktop apps access your microphone > On 
• Under the app list, ensure Microsoft Teams (work or school) is On 

If all options are already enabled: 

• Turn them Off, then turn them On again to force a refresh 
• Close Teams completely (right-click the Teams icon in the system tray > Quit) 
• Reopen Teams 

This reset is required for Teams desktop audio to function correctly. 

2. Force Teams to Rebind the Audio Device 

If Teams keeps switching between the headset and the PC microphone, it often means the device binding inside Teams is corrupted. 

In Teams: 

• Select Settings and more (⋯) > Settings 
• Go to Devices 
• Under Audio settings:  
  • Set Speaker > Your earphone.
  • Set Microphone > Your correct microphone.

• Select Make a test call and complete the recording 

The test call forces Teams to rebuild the audio session, which frequently resolves the interruption behavior. 

3. Verify Windows Sound Input Selection 

If Windows switches input devices while Teams is active, call audio may drop unexpectedly. 

Go to:  Start > Settings > System > Sound 

Under Output: 

• Set your microphone as “Choose a device for speaking or recording” 
• Select the device > Click Start test 

• Confirm Windows detects your voice 

Teams can only operate reliably if Windows has a stable default input device configured. 

4. Contact Microsoft Support 

If the issue persists after trying these steps, the best next step would be to have your IT administrator open a support ticket with Microsoft via the admin center. A technical support engineer can then initiate a remote session, review backend settings, and run diagnostics. If needed, they can escalate the case to specialized engineering teams who are well-equipped to perform advanced troubleshooting and provide targeted solutions.  

As moderators, our primary goal is to provide helpful guidance and support through general troubleshooting steps. While we don’t have access to internal systems or administrative tools required to resolve account-specific or backend issues, we truly appreciate your understanding of these limitations. We genuinely hope the information we share helps point you in the right direction, and we're always here to assist as much as we can within our scope.  

For guidance on how to request support in the admin center, please refer to: Get support - Microsoft 365 admin. 

I hope this information is helpful. Please follow the steps above and let me know if it works for you. If not, we can continue working together to resolve the issue.  

Thank you for your patience and understanding. If you have any questions or need additional assistance, please don’t hesitate to reach out so I can continue to support you. If you found the response useful, please consider marking it as accepted, as this may help other community members who are looking for similar guidance.  

I look forward to continuing the conversation.  

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