Windows Server 2025 domain controllers may lose connectivity after reboot, says Microsoft

Microsoft is warning IT administrators that their Windows Server 2025 domain controllers (DC) may lose network connectivity after they are restarted.

In a Windows release health dashboard update posted Friday, the company said that, after a restart, “Windows Server 2025 domain controllers (such as servers hosting the Active Directory domain controller role) might not manage network traffic correctly,” rendering them inaccessible on the domain network, or possibly allowing “incorrect access” over ports and protocols that should have been blocked.

As a result, it said, “applications or services running on the domain controller or on remote devices may fail, or remain unreachable on the domain network.”