users unable to view menu bar

[Curious]

We have several users that are running windows 10 and IE 11 that are unable to see the menu bar (minimize button, maximize, [x] button to close) and we have users that are able to view the menu bar. What would cause some users not able to view the menu bar and some can?

[Vessy]

Hi George,

Such behavior can be observed if IE is running in Compatibility mode (which also forces the classic rendering of the controls). You can ensure that always the latest installed IE version is used by adding the following lines to the web.config of your application:

<system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="X-UA-Compatible" value="IE=edge" />
      </customHeaders>
    </httpProtocol>
</system.webServer>

More useful information on this matter in the following resources:

• Different appearance or behavior in Internet Explorer on local and production servers;
• Disable the Compatibility View mode of Internet Explorer;
• Problem in IE, works fine in other browsers;

Regards,
Vessy
Progress Telerik

[Curious]

I have the page being rendered as IE9 for multiple reasons. The page worked fine in Window 7 running IE 11, we starting noticing the issues when users were upgraded to windows 10 with IE 11, however, it doesn't happen to all Windows 10 IE 11 users, just a handful

[Vessy]

Hi George,

I am afraid to say that but we dropped the support of the Compatibility mode of IE in the end of 2015, so it is possible for some layout problems to be faced if other than the latest IE version is used. You can see detailed information about the browsers in which our controls are tested and supported here:
https://www.telerik.com/aspnet-ajax/tech-sheets/browser-support

If the same behavior is faced even after the Compatibility mode is disabled, please, open a primary support ticket and send us a runnable sample in which we can reproduce the issue and debug further the cause for it.

Regards,
Vessy
Progress Telerik