Explained! Windows Server 2025 DCs Inaccessible After a Restart

Is the Windows Server 2025 domain controller unreachable after restarting? This article provides a solution.

Problem Description: Microsoft has confirmed that Windows Server 2025 domain controllers (such as Active Directory) may not handle network traffic properly after restarting. This can cause the domain controller to be inaccessible in the domain network or to be accessed incorrectly through ports and protocols that should be blocked by the domain firewall.

Root cause: The domain firewall configuration file is not applied when the domain controller restarts, but the standard firewall configuration file is used.

Potential consequences:

• The domain controller may not be accessible within the domain network.
• Applications or services running on domain controllers or remote devices may fail or be accessible within the domain network.
• Domain firewall profiles restrict ports and protocols may be opened, posing potential security risks.

Temporary Solution:

Microsoft provides a temporary workaround: use PowerShell to manually restart the network adapter on the affected server.

Step 1: Enter PowerShell in Windows Search and select Run as Administrator .

Step 2: In the pop-up window, enter the following command and press Enter :

Restart-NetAdapter -Name *

Step 3: After restarting the network adapter, the problem should be temporarily resolved.

Important: This method is only a temporary solution, and it needs to be repeated after each restart of the server. Microsoft recommends creating a scheduled task to automatically restart the network adapter every time the domain controller restarts. Microsoft engineers are working on developing permanent fixes and will be launched in future updates.

Data backup suggestions:

In view of the above potential security risks, it is strongly recommended to regularly back up important data and even systems. You can do this easily with reliable third-party backup and recovery tools such as MiniTool ShadowMaker.

MiniTool ShadowMaker supports almost all versions of Windows/Server operating systems, and can back up files, disks, partitions, systems, cloning disks, synchronizing files, and creating bootable media.

Summarize:

This article explains the problem that Windows Server 2025 domain controller cannot be accessed after restarting, and provides an effective temporary solution. The final solution needs to wait for future updates from Microsoft.

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