Microsoft fixes unreachable Windows Server domain controllers
Microsoft has resolved a known issue that caused some Windows Server 2025 domain controllers to become unreachable after a restart and triggered app or service failures.
As Redmond explained when it acknowledged the bug in April, servers loading the standard firewall profile instead of the domain firewall one after rebooting will have issues managing network traffic correctly.
Because of this issue, services and applications running on impacted domain controller servers or remote devices may fail or become unreachable for endpoints and servers on the same network.
"Windows Server 2025 domain controllers (such as servers hosting the Active Directory domain controller role) might not manage network traffic correctly following a restart," Microsoft said.
"As a result, Windows Server 2025 domain controllers may not be accessible on the domain network, or are incorrectly accessible over ports and protocols which should otherwise be prevented by the domain firewall profile."
This week, the company addressed this known issue in the KB5060842 Windows security update released during the June 2025 Patch Tuesday.
Admins who can't immediately install this month's updates to mitigate the bug can also apply a temporary workaround requiring them to restart the network adapter manually on impacted servers using the Restart-NetAdapter * PowerShell command.
However, it's important to note that they'll have to restart it after every reboot until they install the KB5060842 update because this known issue will trigger automatically whenever affected domain controllers are restarted.
On Tuesday, Microsoft also fixed another known issue preventing some Windows users from logging into their accounts using Windows Hello after installing the KB5055523 April 2025 security update.
In April, the company resolved another KB5055523 issue that was causing authentication issues when Credential Guard was enabled on systems using the Kerberos PKINIT pre-auth security protocol.
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