November 27, 2017—KB4050945 (Preview of Monthly Rollup)

Applies to: Windows Server 2012Windows Embedded 8 Standard

Improvements and fixes


This non-security update includes improvements and fixes that were a part of KB4048959 (released November 14, 2017) and also includes these new quality improvements as a preview of the next Monthly Rollup update:

  • Addressed issue where smart card logons fail after the authenticating domain controller (DC) has been restarted. The error is: "Signing in with a smart card isn’t supported for your account...". The authenticating DC logs KDC event 19 and Kerberos Distribution event 29 in the System event log. The log states that a suitable certificate cannot be found for smart card logons.

  • Addressed issue where the JET DB cannot open Microsoft Excel files. The error message is: “Unexpected error from external database driver (1). (Microsoft JET Database Engine)".
  • Addressed issue where user preferences are not retained when you click a URL in an app published using Citrix XenApp.
  • Addressed issue that impacted some Epson SIDM (Dot Matrix) and TM (POS) printers, which were failing to print on x86 and x64-based systems. This issue affects KB4048959.

For more information about the resolved security vulnerabilities, see the Security Update Guide.

Known issues in this update


Microsoft is not currently aware of any issues with this update.

How to get this update


This is provided as an Optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update. To get the standalone 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 update 4050945.