Thanks for the info @lukasz-m This is the exact and useful explanation. 

Hi, Does anyone know for which service pack release of AEM 6.5 the ".coral3-checkbox{width : 100%}" class is added in file ("/libs/wcm/msm/content/touch-ui/authoring/editor/css/livecopystatus.css")Because this is distorting the dialog box styling of checkbox where fieldDescription "icon" is appearin...

There it was about migrating from 6.0 to 6.1 , But I'm facing an issue within 6.4 and only in IE 8 and below version where the required jquery is loading but still getting error

Did any one faced the same issue when hitting on submit button of form(non adaptive) on page with selecting version IE 8  in AEM 6.4It is redirecting me to forbidden 403 page and when I checked error log as follow 23.03.2021 16:54:12.084 *INFO* [0:0:0:0:0:0:0:1 [1616498652083] POST /content/formcomm...