The ActiveX control doesn't fire an event when it invokes the event handler function, and Internet Explorer 11 returns a DISP_E_MEMBERNOTFOUND error.
Internet Explorer 11 fails over to the secondary proxy. However, it also passes the authentication context of the primary proxy in the request header.
Note This update was first included in the MS16-001: Security update for Internet Explorer: January 12, 2016.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that don't qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you don't see your language, it's because a hotfix isn't available for that language.
PrerequisitesTo install this hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2. Or, you must have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.
Note Install MS15-124: Security update for Internet Explorer: December 8, 2015 before you install the hotfix that's described in this article.