Thank you. Actually, i dont want to give any product key in answer file and want to activate it later. There are two ISO's present in msdn subscriber download for windows 2012 R2. When i use en_windows_server_2012_r2_x64_dvd_2707946.iso, there is no skip option in Activation screen. And when i use en_windows_server_2012_r2_vl_x64_dvd_2979250.iso, skip Activation is present. Same answer file is used in both cases. Any idea what is the difference between both ISOs? thanks..