Microsoft has addressed a deployment issue affecting Windows Server 2016 systems that failed to install the June 2026 cumulative security update, KB5094122. The problem primarily impacted servers that had skipped the previous month's update, KB5087537, which serves as a necessary baseline. Without this prerequisite, the installation process would fail, leaving legacy systems vulnerable to security risks.

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DNS over HTTPS (DoH) -- a protocol that encrypts DNS queries inside HTTPS connections -- is now generally available for the Windows Server DNS Server role. Starting with the June 9, 2026 cumulative update for Windows Server 2025, you can deploy DoH on your on-premises DNS infrastructure without a third-party resolver. This article explains what DoH does, how it differs from traditional DNS, what the configuration requires, and what limitations currently apply.

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