domain controllers

Microsoft’s latest Windows Server patch drama is a reminder that the most dangerous updates are often the ones meant to protect the crown jewels. An out-of-band fix issued in April 2026 targets a restart-loop problem that could knock domain controllers into repeated reboots after the month’s...

Microsoft has moved quickly to contain a nasty April 2026 Windows Server servicing problem, issuing out-of-band fixes that address both repeated restart failures and update-installation errors tied to the month’s Patch Tuesday release. The immediate relief is real for administrators running...

Microsoft’s April 2026 Patch Tuesday is turning into an uncomfortable reminder that Windows servicing can fail in more than one way at once. While Microsoft is already dealing with a Microsoft account sign-in regression in Windows 11, fresh reporting and forum analysis now point to a separate...

Microsoft’s April 2026 Patch Tuesday is already looking like a case study in how security updates can collide with identity and boot-time reliability at the worst possible moment. On one side, Microsoft has confirmed that Windows account sign-in can fail after March’s KB5079473 update, with a...

Microsoft’s security feed now lists CVE-2026-21243 as a vulnerability in the Windows Lightweight Directory Access Protocol (LDAP) that can be leveraged to cause a denial-of-service condition against Windows systems, and the advisory emphasizes uncertainty around the detailed technical root cause...

Microsoft has quietly shipped a set of emergency, out‑of‑band updates to repair a Kerberos authentication regression that broke sign‑ins and remote access on domain controllers after the November 8, 2022 Patch Tuesday rollup — and administrators must install the fixes manually on every Domain...

Microsoft pushed a set of emergency, out‑of‑band patches in May 2022 after a security hardening in the May 10 cumulative updates changed how domain controllers map client certificates to machine accounts — a change that briefly broke certificate‑based authentication for services such as Network...

Microsoft’s May 2022 cumulative update KB5013943 introduced a certificate-mapping change that briefly broke certificate-based authentication on domain controllers, disrupting Network Policy Server (NPS), RADIUS, RRAS, EAP/PEAP flows and leaving administrators scrambling for workarounds until...