Microsoft: Windows Server 2025 restarts break connectivity on some DCs

Microsoft warned IT admins that some Windows Server 2025 domain controllers (DCs) might become inaccessible after a restart, causing apps and services to fail or remain unreachable. As the company explained, this is caused by the servers loading the standard firewall profile instead of the domain firewall ones after rebooting. "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 in a Friday Windows release health dashboard update. "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." Because of this known issue, services and applications running on affected DC servers or remote devices may fail or become unreachable for other endpoints and servers on the network. Workaround availab ... Read full article.