Prior to the 2/2/2009 release of Adobe Digital Editions 1.7, it was not possible to license or distribute Digital Editionson intranets or non-connected machines.
Beginning with Digital Editions 1.7 a standalone installation and administrator install instructions are available on the Adobe Digital Publishing Technology Center.
No distribution license is required to distribute the Digital Editions installer (1.7 or later) on your intranet or fixed media.However, each install is treated as a single-user machine, and during each install the single-user EULA must be accepted for that machine. Digital Editions does not support managed user or active directory environments in which the user's profile follows them from machine to machine. Adobe is considering this for future releases.