Microsoft: June Windows Server security updates cause DHCP issues
Microsoft acknowledged a new issue caused by the June 2025 security updates, causing the DHCP service to freeze on some Windows Server systems. On Windows Server systems, the Dynamic Host Configuration Protocol (DHCP) Server service automates assigning IP addresses and other network configurations, reducing network administration and ensuring reliable IP address configuration in Windows networks. In affected environments, the new DHCP known issue confirmed by Microsoft over the weekend prevents renewals of unicast IP addresses from applying correctly across network devices.
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