Microsoft has resolved Always On VPN connection failures that occurred following the installation of September 2026 Windows 11 security updates. The company confirmed the fix was included in this month’s KB5127936 preview update. The Always On VPN service provides secure remote access to corporate networks for various types of Windows devices. Users experienced connection failures when automatic protocol selection was enabled with IKEv2 and SSTP protocols, resulting in connections remaining stuck or displaying error messages about ports already being in use.
For users who prefer not to install the preview update, Microsoft offers a temporary workaround. Administrators can manually configure Always On VPN profiles to use either SSTP or IKEv2 protocols exclusively, rather than relying on automatic protocol selection. This approach allows organizations to prevent VPN failures while awaiting the next scheduled monthly update. Microsoft previously incorrectly marked this issue as resolved in October 2026 cumulative updates before providing the actual fix.
Source: Read the full story at BleepingComputer
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