The document "instructs to create administrative installation using MSI file, which then is supposed to be patched by the MSP patch.
However, with 11.1, the page "Download Adobe Reader" gives for download an executable.
How one is supposed to follow the Guide having downloaded .exe ?
I do know how to extract msi from exe, as well as where to obtain the msp - but I'm wondering, what is the "official" way? is it documented somewhere?
You should start by reading the introduction which has this information in about a half dozen places alongside other details such as identifying installers, what's already installed, best practices, update rules and constraints.
If you don't think you need those details, go here for all the links:
Thanks - I overlooked the reference to ftp. Maybe it would make sense to put ftp links on the page /enterprise, in addition to or even instead of the download of the setup.exe.