September 17, 2018—KB4464217 (OS Build 16299.666)

Improvements and fixes

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

Addresses an issue that may prevent a VPN connection from establishing for some users that are using VPN with IKEv2. The connection fails with the error, “Remote Access Error 809.”
Addresses a Microsoft Intune issue that occurs after installing any of the updates released between July 24, 2018 and September 11, 2018. Windows no longer recognizes the Personal Information exchange (PFX) certificate that’s used for authenticating to a Wi-Fi or VPN connection. As a result, Microsoft Intune takes a long time to deliver user profiles because it doesn’t recognize that the required certificate is on the device.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

Known issues in this update

Symptom

Workaround

After you install the August Preview of Quality Rollup or September 11, 2018 .NET Framework update, instantiation of SqlConnection can throw an exception. For more information about this issue, see the following article in the Microsoft Knowledge Base:

4470809 SqlConnection instantiation exception on .NET 4.6 and later after August-September 2018 .NET Framework updates

This issue is resolved in KB4480967.

How to get this update

This update will be downloaded and installed automatically from Windows Update. To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4464217.