Share Screen in Teams would be stucked and restarted

Dear @MQ WANG,

Thank you for posting your question in the Microsoft Q&A forum.

Based on your description, every time you share screen in Teams, your device was auto restarted. Although you have tried all the methods as clear teams cache, upgrade, uninstall and reinstall but cannot resolve the issue. So, you want to know how to contact to Microsoft Support team for investigate this situation.

The Microsoft Online Support Team has higher permission than us moderators to remotely assist you and collect background logs for the root cause. This is a more efficient and direct way in recovering this scenario for you.

If you are user, you can contact to your IT/administrator. They can follow these steps as the link : Get support - Microsoft 365 admin. to help you submit support ticket

And if you're unsure who your Global Admin is, this guide may help How do I find my Microsoft 365 admin? - Microsoft Support   

If you are an Admin, there are some solutions that you can contact Microsoft Support as: Use this link to find the appropriate contact number: Global Customer Service phone numbers - Microsoft Support   

To help you navigate the automated phone system (IVR), here’s an example of how the conversation might go:    

IVR: What kind of problem are you concerned about?     You: Teams issue (describe your issue)

IVR: What kind of product do you use?     You: Office 365 for business    

IVR: Education or business account?     You: For business    

IVR: Are you an administrator?     You: Yes    

IVR: Do you have another administrator in your organization?     You: No    

IVR: Do you need a service request?     You: Yes    

This should help you get connected to a live support agent who can assist you directly.    

Or you also can submit ticket via Admin portal Microsoft 365 Admin Center > Support > Help & Support.

I hope information above meet your expectation. If it does not, please leave the comment below so I can support you more effectively

Based on the described behavior and the steps already taken (clearing cache, updating macOS, reinstalling Teams), the issue is likely related to graphics hardware acceleration or the macOS sharing stack rather than Teams cache or installation.

Try these targeted steps on macOS:

1. Verify GPU hardware acceleration support
   • Open Microsoft Edge and go to edge://gpu/ or open Google Chrome and go to chrome://gpu/.
   • Check whether any key entries show "Software only" or "hardware acceleration unavailable".
   • If so, the system may not be providing hardware acceleration. In that case, contact the device or GPU vendor, as Teams features such as screen sharing and control rely on hardware acceleration and can behave unpredictably when it is unavailable.
2. Check Teams GPU hardware acceleration setting
   • In Teams, go to Settings > General.
   • Ensure Disable GPU hardware acceleration is not selected.
   • Restart Teams after changing this setting.
   • If the Mac is older or has known GPU issues, test both states (enabled and disabled) to see which avoids the crash/restart while sharing.
3. Avoid native macOS content sharing (if enabled)
   • In Teams, go to Settings and more > Settings > General > Screen sharing.
   • If Use macOS content sharing is turned on, turn it off and test again.
   • The native macOS sharing experience has known issues with some docking solutions and macOS versions, which can affect sharing stability.
4. Check for known macOS sharing issues
   • If using a docking station (especially DisplayLink or similar) on macOS 14 or later, disconnect the dock and try sharing directly from the built-in display or a simple HDMI/USB‑C connection.
   • Known issues with docks can affect sharing indicators and control panels and may contribute to instability.
5. Confirm Teams permissions
   • Go to Apple menu > System Settings > Privacy & Security > Screen & System Audio Recording.
   • Ensure Microsoft Teams is enabled.
   • If you change this, restart Teams and test sharing again.
6. If the Mac is hard‑restarting
   • A full machine restart during screen sharing usually indicates a low‑level OS, driver, or hardware problem (GPU, dock, or display driver), not just the Teams app.
   • After confirming the above, collect macOS crash logs and hardware diagnostics and engage Apple or the device OEM, as well as Microsoft Support, with those logs.

For live support, open a support ticket through the Microsoft 365 admin center (if in an organization) or use the "Still need help?"/"Contact support" options in the Teams or Microsoft support portals so an engineer can review logs from the device.

References:

• "Give Control" doesn't work when you share a screen in Teams
• Present content in Microsoft Teams meetings
• Clear the Teams client cache
• Fix screen sharing video display lag issue in Teams
• Content not shown in optimal fidelity