Microsoft: April Windows Server updates cause NTLM auth failures

May 1, 2024 at 11:18AM Microsoft has acknowledged NTLM authentication failures and high loads after installing recent Windows Server security updates. The issue affects domain controllers with high NTLM traffic and few primary DCs. Affected versions and updates include Windows Server 2022 (KB5036909) and others. While Microsoft works on a fix, organizations can uninstall the … Read more