The approved response doesn't show up to work for IIS7+, heading by the big quantity of questions on cache headers not becoming despatched in II7: ! Immediately after trying every little thing in every other suggestion, adding the "Differ: *" header is seemingly The one thing that will drive IE8 https://emilianosfzsl.blogzet.com/not-known-facts-about-transporte-de-equipos-con-camión-pluma-51211265