With Windows Defender Application Guard Enabled and Symantec Endpoint Protection (SEP) firewall installed, traffic from network applications (such as the Edge web browser) is blocked.
Windows 10 Enterprise (Build 1709 or higher)
Windows 10 Professional (Build 1803 or higher)
With Application Guard enabled, network traffic from protected applications is modified in complex ways that the current version of the SEP Firewall does not account for.
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