Updated 22 September,2026 · 6 min read
Nothing breaks the flow of a meeting faster than seeing everyone type “you’re on mute” while you’re clearly speaking. A dead mic in Microsoft Teams usually comes down to a few common causes. Most of these issues can be fixed in under a minute once you know where to look.
Most microphone problems in Teams are caused by the input device being selected a physical mute switch or button on the headset or mic or blocked microphone permissions in the operating system. Checking your device selection in Teams settings. Confirming OS level mic permissions fixes the majority of cases.
If you have a headset a laptop’s built-in mic and a webcam with a mic all connected at the same time Teams might be using the wrong one. You could be speaking into your headset while Teams is still listening to the laptop’s mic, which is sitting a feet away.
Many headsets and USB mics have a mute button or switch. It’s easy to turn it on. Since the mute happens before the audio reaches Teams the app sees no signal all. That means no sound. No warning either.
like cameras both Windows and macOS control microphone access on a per-app basis. If Teams doesn’t have permission you may see the mic as connected in Teams. No audio will come through.
Windows has a setting called “exclusive mode” that lets one app take full control of a microphone. If another app. Like a recording tool. Is using it at the time Teams can be locked out even though the mic still appears to be available in Teams.
USB headsets and standalone mics sometimes need updated drivers or firmware. This is especially common after a Windows update. The issue often shows up as cutting out rather than total silence, which makes it harder to spot at first.
1-Start with the obvious: check for a mute switch.
Look for a button in-line switch or LED indicator on your headset or mic. Make sure it’s not turned on. This takes ten seconds. Fixes a surprising number of mic issues before you even open any settings.
During a call click the three dot menu then Settings → Devices. Check that the right microphone is selected under “Microphone.”. Watch the input level bar. If it doesn’t move on any device the problem is likely not with Teams. It’s at the OS or hardware level.
Go to Settings → Privacy & Security → Microphone. Make sure “Microphone access” is on. Then scroll down. Confirm that Microsoft Teams is allowed to access the mic.
Open System Settings → Privacy & Security → Microphone. Make sure the toggle next to Microsoft Teams is switched on.
Right-click the speaker icon in the system tray → settings. Click your microphone → Device properties → device properties. Under the Advanced tab uncheck both boxes under “Exclusive Mode.”
Open Device Manager → Expand “Audio inputs and outputs” → Right-click your microphone → Update driver → Search for drivers.
Go to Settings → Devices → “Make a test call.” This is a way to confirm the issue is fixed without having to interrupt an actual meeting.
If you’ve tried every step. The mic still doesn’t work, test the hardware itself. Plug the headset or mic into a device. Like a phone or another laptop. If it doesn’t work there you’re likely dealing with a hardware failure. No software fix will help. Cheap USB headsets often fail at the cable or connector first.
Also remember that Teams can have service-side issues. If other people are having the problem at the same time check Microsoft’s service status page before assuming the issue is only on your machine.
This points to either a permission block in Teams or the wrong device selected in the app. Both are worth checking before you try anything else.
Intermittent cutting out usually means a driver issue or a wireless headset losing its Bluetooth connection. That can happen due to distance. Interference nearby.
Sometimes. Especially if Teams cached a device list after plugging in a new mic. It’s a first step but the steps above usually find the real cause.
Yes, occasionally. If the problem started after an update go back to the permission and device selection steps. Updates sometimes reset app-level permissions without warning.
Its based on testing with built-in laptop microphones, USB headsets and Bluetooth headsets, on Windows 11 and macOS.
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