When visiting Microsoft website to download VS2015 you can download a file of a few MB in size to install Visual Studio. When you open the file it acquires the files necessary from internet, but you can not choose where these files are stored. How can I download the entire installation of Visual Studio 2015 to perform an offline installation? For example, for multiple machines.
edit:
Starting from visual studio 2017 Microsoft is no longer offering .ISO images. For the new visual studio 2017 you have to download vs_community.exe from here and create an offline instalation folder:
vs_community.exe --layout c:\vs2017offline
Then, in order to install from that folder you have to first install certificates from \certificates in the download folder and then run the installation.