Surface Hub Miracast Connection Error

Fri, 05 Jan 2018 10:48:59 +0000

Recently I had to troubleshoot a sticky Surface Hub Miracast Connection error for a customer. They were unable to connect to the surface hub from domain joined devices but a newly installed device from a blank Windows image was working as expected. I started Troubleshooting the Surface Hub Miracast Connection Error and checked all the points mentioned in the official Troubleshoot Miracast on Surface Hub post from Microsoft.

Default Configuration
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On a Windows 10 1709 device exists a default firewall rule to allow Miracast connections to wireless displays:

But the connection attempt was still interrupted after a timeout.

Looking trough Group Policy
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After analyzing the Windows 10 Security Baseline Group Policy configuration I came across the following settings:

Computer Configuration > Windows Settings > Security Settings > Windows Firewall with Advanced Security:

In the settings for the public profile under the “Customize” section there’s a section called “Rule merging”:

As you can see rule merging is turned of in the Windows 10 Security Baseline which means, **all locally configured firewall rules are being ignored for the public profile. **Because Miracast connections or connection attempts belong to the public profile of the Windows Firewall, the built-in local firewall rule gets always bypassed.

Miracast on Nicola Suter

Surface Hub Miracast Connection Error

Default Configuration #

Looking trough Group Policy #

Default Configuration
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Looking trough Group Policy
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