These files have the following restrictions to prevent the content from being posted or shared: Launch the Adobe Digital Editions software on your computer and then log in your account. The limelinx tools (includes the DeDRM app but, most importantly, the DeDRM_calibre plugin) Configuration. In the list of programs displayed, click on 'Adobe Digital Editions', then click the 'OK' button. \My Documents (or Documents)\My Digital Editions\.
This is a link file used by Adobe Digital Editions to download the actual epub or pdf file, and it is at this point that the DRM gets applied for your installation of Adobe Digital Editions.