"Failed to Initialize connection subsystem" error when you establish VPN connections in Windows

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials


This issue occurs when the following conditions are true:


To resolve this issue, go to Microsoft Update.

The Microsoft Update will help you install March cumulative security update for Internet Explorer (MS15-018) or Vulnerability in SChannel could allow security feature bypass: March 10, 2015 (MS15-031). If you download and install updates manually, refer to the Affected Software table in Microsoft Security Bulletin MS15-018 for download links.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


See the terminology that Microsoft uses to describe software updates.