While trying to download the list of files for an exchange I am getting different results. I am using "Prefer: odata.maxpagesize=1200; respond-async" header for the same. For IEU, NAQ,NMQ, NSQ I am not getting the entire list for last 30 days, however using the same header I am getting the entire list for other exchanges like AEX,ASQ,SES,SHH etc. We are trying to automate the download process so using odata.nextlink is a pretty difficult choice. Please help.