Can't connect to WiFi after Windows 10 update WPA-invalid-2/4-key-msg

  1. Posts : 1
    Windows 10

    Can't connect to WiFi after Windows 10 update WPA-invalid-2/4-key-msg

    After our laptops update to Windows 10 v2004 (the May 2020 update), they will no longer connect to our WPA2-Enterprise FortiAP WiFi network. We have troubleshooted and checked our RADIUS/NPS settings, and they are correct. The users get authenticated, but the connection fails with this message in the FortiGate Logs:

    Probably wrong password entered, invalid MIC in 2/4 message of 4-way handshake from client

    The laptop's event logs report "Dynamic Key exchange did not succeed withing configured time"

    Other laptops still on Windows 10 1909 can connect just fine. And if we roll back the Windows 10 update to 1909, it will connect again. If we take the laptop to our other office with Aruba AP's they connect just fine. So it's something to do with the Windows 10 2004 update and the FortiAP 221E Access Points. We just can't figure out how to fix it.

    Any ideas or suggestions would be greatly appreciated! Thanks!
      My Computer

  2. NMI
    Posts : 1,004
    Windows 11 Pro, Version 22H2

    Also posted at Microsoft Community and Fortinet Forums.
      My Computer


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