Windows 11 Domain Trust Error After September 2026 Updates
Windows 11 Domain Trust Error After September 2026 Updates Windows 11 Domain Trust Error After September 2026 Updates Identify and fix it with Microsoft Intune After installing the September 2026 Windows 11 security updates, some domain-joined devices may lose their secure trust relationship with an on-premises Active Directory domain. Users may see: The trust relationship between this workstation and the primary domain failed. The user's credentials may be correct. The problem can instead be the computer's Secure Channel with Active Directory. Microsoft identified Machine Identity Isolation as the cause of this issue in affected environments. The September 8, 2026 security update causes Windows to begin honoring existing or policy-provisioned Machine Identity Isolation enforcement. Microsoft states that the feature is supported only when connected to domain controllers running at Windows Server 2025 Domain Functional Level (DFL) or later . ...