I've recently lost the ability to use the 'share screen' function within a Teams meeting

Hi @Oisin,

Based on the screenshot, the Share button is still available and options such as Whiteboard, PowerPoint Live, and Excel Live are visible. However, the area that would normally display Screen and Window sharing options appears completely blank.

To help narrow this down, could you please clarify a few things?

• Were you the organizer or just an attendee in that meeting? Could you try creating a test meeting that you organize yourself and check whether screen sharing works there?
• Does the same issue occur if you join the meeting using Teams for web?
• Are you able to sign in to Teams on another device and test whether screen sharing is available there?
• Have any of your colleagues within the same organization reported a similar issue?

In addition, one possible cause that comes to mind is that screen sharing may be restricted by a Teams meeting policy. A Teams administrator can configure the Screen sharing mode as follows:

• Entire screen: Allows sharing the full screen and application windows.
• Single application: Allows sharing only individual application windows.
• Not enabled: Disables both screen sharing and application sharing.

Because Whiteboard and PowerPoint Live are controlled by separate settings, those options can still appear even when screen sharing itself has been restricted. This seems reasonably consistent with what we're seeing in your screenshot.

For your reference: Manage meeting policies for content sharing - Microsoft Teams | Microsoft Learn

To confirm whether this is policy-related, I'd also recommend reaching out to your organization's Teams/IT administrator, as they are the ones with permission to review and modify these settings.

I hope this gives you a few additional avenues to investigate. If you're able to share any updates or test results, please feel free to get back to me. I'd be happy to take a closer look and help further.

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