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A Microsoft Teams test call helps check selected audio devices before a real meeting. It is a device check, not proof that guest admission, network behavior or the actual meeting's sharing setup will work in every context.
Use the supported desktop test-call feature
Microsoft documents the test-call feature in the Windows and Mac desktop app. Open Settings and more, Settings and Devices, then Make a test call under Audio settings. If you are using a different client, do not assume the same test control will be available.

Inspect microphone and speaker selection
Choose the intended input and output devices before following the Test Call Bot instructions. Record a short non-sensitive sample and listen to playback. A successful connection with the wrong microphone can still produce poor sound in the actual meeting.
Check the real meeting setup separately
Review the test summary and correct device settings where needed. Rehearse screen sharing and camera framing separately, especially after changing docks or headphones. A test call does not validate the meeting invitation, organizer's lobby policy or every network condition encountered later.
A practical checklist
- Use the supported desktop client.
- Select the intended microphone and speakers.
- Record only a harmless test message.
- Review playback and the summary.
- Check meeting access and screen sharing separately.
Worked example
Illustrative example: a consultant's laptop selects its built-in microphone after a headset reconnects. The test call reveals distant audio, so they select the headset and repeat the check. They also test screen sharing in a rehearsal, because audio playback alone does not verify presentation privacy.

Common questions
Is the test-call control available in every Teams client? No. Does a test call guarantee the client meeting admits you? No. Is hearing a sound enough to validate the correct microphone? No; listen to the recorded sample and inspect the selected device.
What to do next
Run a quick device check after hardware changes. Keep audio validation and organizer-access troubleshooting separate so the right issue is addressed.
