File upload fails if a 401 authentication challenge occurs on HTTP POST in Internet Explorer 11

Won’t fix Issue #7194936


Paul M.
Apr 13, 2016
This issue is public.
Found in
  • Internet Explorer
Reported by 1 person

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Steps to reproduce


Comments and activity

  • Microsoft Edge Team

    Changed Assigned To to “Venkat K.”

    Changed Assigned To from “Venkat K.” to “Brad E.”

  • Hello,

    Thank you for the feedback on IE11. Do you have a repro or live site that we can test this problem out with?

    All the best,
    The MS Edge Team

  • Hi, sorry but the live site is a secure intranet…

    I have repro’d with a fresh mvc app, with the following.

    Home controller:

            public void UploadDocument(HttpPostedFileBase uploadedDocument)

    The cshtml:


    and the js:

    function document_ready() {
        $("#docFormButton").click(function () {
            var formData = new FormData($('#docForm')[0]);
                url: 'home/UploadDocument', 
                type: 'POST',
                success: function () { return false; },
                data: formData,
                cache: false,
                contentType: false,
                processData: false



  • Microsoft Edge Team

    Changed Status to “Won’t fix”


    Sorry for the delay, and thank you for your
    feedback. Sorry to hear that you are having difficulties with Internet
    Explorer. However we’re not presently working on feature bugs in Internet
    Explorer outside of security-related issues.

    Alternatively, if
    you have a premier support contract you can visit

    and open
    a support incident and work with an engineer to address this issue.


    Best regards,

    The MS Edge Team

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