IE Compatibilty Mode Win 11 and Java

Williams, Brian 1 Reputation point

I have a legacy website that uses java. On machines running windows 10 with Java installed, the site runs fine in IE compatibility mode. However, it will not run on a windows 11 machine in IE compatibility mode configured the same way. I've installed Java, and entered the website url into the trusted sites in the Java control panel.
Note, it is not java script - java script is turned on. This was supposed to be supported until sometime in 2028 according to what I've read. What am I missing?

Microsoft Edge
Microsoft Edge
A Microsoft cross-platform web browser that provides privacy, learning, and accessibility tools.
1,920 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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  1. S.Sengupta 13,466 Reputation points MVP

    Which version of Java is installed there?
    Try the latest version

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  2. Williams, Brian 1 Reputation point

    Yes - I had previously installed Java 8.03210.7 directly from Oracle - but I went to your link and installed the SDK which is version 17.020. My site is trying to open applets

  3. Williams, Brian 1 Reputation point

    No - it still doesn't work. I'm not sure if the latest Java SDK works in Win 10 IE mode - it is not installed on my Win 10 machine

  4. Williams, Brian 1 Reputation point

    The version of Edge on both Win 10 and 11 is Version 98.0.1108.43 (Official build) (64-bit)

    I do not see and information in Event viewer logs

    I'm not sure how to see document mode as F12 developer tools does not work in IE mode. If you have exact instructions how to get this info if you think it helps, I'll be happy to perform the steps.

    Is IE Mode supposed to work with Java applets in Windows 11 as it does in Windows 10?

  5. Williams, Brian 1 Reputation point

    Ran the developer tools on the Windows 11 machine and see the following in the Console tab:

    HTML1527: DOCTYPE expected. Consider adding a valid HTML5 doctype: "<!DOCTYPE html>".

    Ran the developer tools on the Windows 10 machine and see the same message in the Console tab.

    Also, when Navigating in the website on the W11 machine, I get the attached message - if I click more info, it takes me to the Java website to install Java - which I have already done.