Microsoft Baselines (GPO) / Intune Windows Baselines break Miracast Functionality (connect to a wireless display).

Ilias Drosos March 16, 2024 Microsoft Baselines

Recently I run into a problem with one of my customers . After deploying the latest MIcrosoft Windows Baselines users were not able to use Connect to wireless diplay.

I suspected that something in the baselines broke this functionality so I started searching within the settings.

The documentation provided did not mention miracast or cast at all so I decided to disable the settings , first the ones I thought that could lead to such a problem and later the others .

Well if you are in the same situation search no more .

After 2 hours of searching I found out that none of the settings I thought broke the functionality . The problem was Windows firewall. If you haven't enabled Windows firewall on your clients and apply the policies then windows firewall will be turned on .

But to find the exact process to exclude you need to know which that is and which firewall profile it is using .

After all when you click on connect to a wireless display it turns out your computer is using wi-fi adapter to connect to a hotspot your television is broadcasting. That said the profile to change is the firewall Public profile since this is the network that is recognized as a public connection when your computer makes a direct connection with the TV/Screen to cast.

So go and make an inbound exception on your firewall profile either from GPO/Intune/Manually for the app :