September Windows updates break Always On VPN connections

Microsoft has notified IT administrators that users may experience Always On VPN connection issues after installing the September 2026 Windows 11 security updates.
Always On VPN is a remote access solution that replaces the legacy DirectAccess technology and works with domain-joined, non-domain-joined, and Microsoft Entra ID–joined devices.
It is available on Windows 10, Windows 11, and Windows Server, and it runs seamlessly in the background, establishing a secure tunnel back to the corporate network automatically whenever a device connects to the internet.
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