Download SSIS Packages From Server
Extract ISPAC file SSMS -> Integration Services Catalogs -> SSISDB -> MyProject01 -> right click and click on “Export” XXXX.ispac file will be generated. Rename the .ISPAC file to .ZIP, after that you can to extract all files from that zipfile. Sources: http://microsoft-ssis.blogspot.com/2016/04/get-packages-from-ssis-catalog.html