Defender application guard and hyper-V NIC preventing access to internet

Rodrigo Catarino 0 Reputation points
2023-05-18T16:11:21.3066667+00:00

Hi,

We have enable the windows feature "Defender Application Guard".

We are now having some issues when accessing the internet.

The "globe" icon appears and windows is unable to detect the internet, although the user can access internet.

While the "globe" is showing, the user is unable to access to Teams and send/receive emails.

When this happens, we disable the hyper-v NIC and after a few seconds, all is working as expected.

After this we go to add and remove features, enable hyper-v feature, then reboot the pc and then disable the hyper-v feature again.

All computers are part of a domain.

No policies are defined for the application guard, we have only enabled the windows feature.

This seems to be happening to the computers where we have enabled the application guard.

Kind regards,

Rodrigo Catarino

Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
11,128 questions
Hyper-V
Hyper-V
A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
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  1. Limitless Technology 44,096 Reputation points
    2023-05-19T11:25:49.6033333+00:00

    Hello there,

    You can disable your proxy and return to the default settings as one of the simplest fixes. To accomplish this, adhere to the guidelines below:

    Windows Key+S on your keyboard.

    Enter after typing "control panel" without any quotes.

    Then select Network and Internet.

    Choosing Internet Options

    Click LAN settings after switching to the Connections tab.

    Check the box next to "Use a proxy server for your LAN" and deselect it.

    The option next to "Automatically detect settings" should be checked.

    To save your changes, click OK.

    Similar discussion here https://learn.microsoft.com/en-us/answers/questions/1132785/windows-defender-application-guard-doesnt-work-pro

    Hope this resolves your Query !!

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