Internet Explorer 10 Turning Compatibility mode on (From server)

In order to turn Compatibility mode on for Internet Explorer the server should send “X-UA-Compatible” as a header with the value IE=EmulateIE9. This will force Internet explorer to use compatibility mode if it is a version higher than 9

If we using ISS (making for instance a project) the following web.config can be used to do this.

  <!-- Other settings -->
        <clear />
        <add name="X-UA-Compatible" value="IE=EmulateIE9" />

Mode details on the possible values for the header tag

Sometimes sending this as a header tag works, then this should be sent first in the header tag

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE9" />