Hello Hussein
I am V. Arya, Independent Advisor, to work with you on this issue.
- Open Teams app - Click your picture on top right - Settings - Permissions - Media permission should be ON.
Also in Devices - Check for Audio Devices - By default, it is properly selected. If not, select it properly. Not having the right microphone / speaker selected is a major cause of this issue.
- If above doesn't work, assuming this is Windows 10 (if any other OS, let me know)
Press Windows key, hold it and press i
Privacy - Microphone
Allow apps to access your Microphone - Should be ON
Choose which Store apps can access your Microphone and Allow desktop apps to access your Microphone - Teams should be ON wherever it appears
- Try from Web Teams using Edge or Chrome browser and let me know whether it works or not. This will help me to diagnose where is the issue - https://teams.microsoft.com/
Please update me with the result. If above doesn't work, I will provide other steps.