Fix "Teams needs permission to use this device" (microphone)
This exact error means Teams asked for the microphone and got refused before it ever reached your input device list — it's a permission problem, not a broken mic. Give permission at every layer Teams touches: Windows privacy, the browser (if you use Teams on the web), and Teams itself.
Where's the permission actually blocked?
Step-by-step fix
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Open Settings → Privacy & security → Microphone and confirm Microphone access is on, then scroll down to Let desktop apps access your microphone and turn that on too — this second toggle specifically governs the Teams desktop client, and it's the one people miss because the first toggle looks like it should cover everything.
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Using Teams in a browser instead of the desktop app? The permission lives with the site, not Windows: click the lock icon in the address bar, set Microphone to Allow for teams.microsoft.com, and reload the tab.
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In Teams itself, open Settings → Devices and re-pick your microphone from the dropdown — a stale or disconnected device selection can trigger the same permission-style error even when Windows access is correctly granted.
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Fully close Teams — right-click its icon in the system tray and choose Quit, not just the window's X — then reopen it. Permission changes and device-list refreshes often need Teams to restart to take effect.
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Confirm the microphone itself works outside Teams: run the CheckMyMic microphone test. If it's silent there too, the problem is Windows-level, not Teams — see our mic not working on Windows 11 guide.
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Still blocked? Sign out of Teams completely and sign back in — a corrupted profile cache occasionally re-triggers the permission prompt incorrectly, and signing out clears it.
Frequently asked questions
How do I give Teams permission to use my microphone?
On Windows, open Settings → Privacy & security → Microphone, turn on Microphone access, and also turn on Let desktop apps access your microphone — Teams' desktop client specifically needs that second toggle. If you use Teams in a browser, allow the microphone for teams.microsoft.com behind the lock icon instead.
Why does Teams say it needs permission even though I already allowed the microphone?
Windows has two separate microphone toggles: one for the general apps category and a second, easy-to-miss one for desktop apps specifically. The Teams desktop client needs the desktop-apps toggle on — having only the general one enabled still produces this exact error.
I fixed the Windows permission but Teams still shows the error — what else?
Fully quit Teams (system tray icon → Quit, not just closing the window) and reopen it — permission changes don't always apply to an already-running session. Then re-pick your microphone in Settings → Devices in case the device list itself is stale.
I've tried everything and Teams still says it needs permission — what now?
Confirm the microphone works outside Teams with the CheckMyMic microphone test, then check whether the actual error has changed — a completely empty device dropdown is a different problem covered in our <a href="teams-no-microphone-found.html">"no microphone found" in Teams guide</a>, and general mic-in-Teams issues beyond permission are covered in our <a href="mic-not-working-teams.html">mic not working in Teams guide</a>.