Microsoft has begun a staged hardening of Kerberos on Windows domain controllers: starting with security updates released on January 13, 2026, domain controllers will gain new telemetry and audit controls that identify weak Kerberos encryption usage, and Microsoft plans a phased default flip so...
Microsoft is flipping a decades‑old Kerberos default in Windows Server — and IT teams must treat it as an operational deadline, not a theoretical security tweak.
Background / Overview
Microsoft has announced a change to how the Kerberos Key Distribution Center (KDC) on Windows domain controllers...