File upload that uses XHR Post request may fail when it's challenged with Negotiate 401 response in Internet Explorer 11

Symptoms
This issue occurs when the file upload operation uses an XMLHTTPRequest (XHR) API that uses FormData objects. Specifically, the upload fails if the request is challenged for authentication.
Resolution
To fix this issue, install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update. Additionally, see the technical information about the most recent cumulative security update for Internet Explorer.

Note This update was first included in the MS16-051: Security update for Internet Explorer: May 10, 2016.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
Properties

Article ID: 3157588 - Last Review: 05/20/2016 02:01:00 - Revision: 2.0

Internet Explorer 11 on Windows 7 SP1, Internet Explorer 11 on Windows 8.1 Update

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