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osTicket v1.10 (stable) and Maintenance Release v1.9.15 are now available! Go get it now

Login Failure "Authentication Required" with Internet Explorer, not Firefox or Chrome


We are experiencing a Admin login failure with Internet Explorer, but not with Firefox and Chrome. This happened all of a sudden.
I have cleared the cache, tried compatibility settings and nothing seems to work. It consistently says "Authentication Required". Same issue on Microsoft Edge.  Have you seen this issue ?


  • Version of osTicket?
    Version of IE?
    Compatibility mode?

    Q: Have you seen this issue ?
    A: I have not.
  • v1.9.12

    IE Version 11.103

    I have tried Compatibility Mode on and off

  • The issue has disappeared after one day with nothing done. Since this was across multiple computers across multiple states and locations, I assume it was something on the hosting site, but we are not sure.
  • any solution... i have the same problem

    IE - Version 11.576.14393.0
    Edge - 38.14393.0.0

    No problem:
    Chrome, Firefox

    Server version: Apache/2.4.10 (Debian)
    Server built:   Sep 15 2016 20:44:43
    Server's Module Magic Number: 20120211:37
    Server loaded:  APR 1.5.1, APR-UTIL 1.5.4
    Compiled using: APR 1.5.1, APR-UTIL 1.5.4
    Architecture:   64-bit
    Server MPM:     prefork
    threaded:     no
    forked:     yes (variable process count)

    PHP 5.6.29-0+deb8u1 (cli) (built: Dec 13 2016 16:02:08)
    Copyright (c) 1997-2016 The PHP Group
    Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies

    osTicket (v1.10)

  • @sdrozdz please open your own thread if you are having an issue rather than hijacking someone elses.  Closing old thread for 1.9.12.
This discussion has been closed.