Dear DA30501
Good day! Thank you for posting in the Microsoft Community. We'll be happy to help!
First of all, we regret for the inconvenience and inconvenience caused to your work. Based on your description, I have a general understanding of your issue, please first kindly refer to this official document My microphone isn't working in Microsoft Teams - Microsoft Support
In addition, for new teams known issue, please kindly refer to this official document to get more details **** Known issues in the new Microsoft Teams desktop client - Microsoft Teams | Microsoft Learn
Meanwhile, if your problem persists, I have to confirm something with you:
- This doesn't exist on classic Teams, you've tested this, haven't you?
- Will this still happen if you're using your account to sign in to the Teams web app?
- If you hold a test meeting with speakers (sound out) on Teams without a headset, do I get the same error? Please test this, thanks.
Please kindly note that our initial response may not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.
Thank you in advance for your understanding. Your patience and cooperation will be greatly appreciated. I hope for all the best!
Sincerely
Kerry Chen | Community Moderator