I couldn't download Adobe Digital Editions on my MacBook Pro so I used my friends computer to download it and read a url link eBook.
Now I have downloaded ADE on my MacBook Pro but I can't open the url link on my ADE, it says E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER.
How can I open it? Or do I have to buy the same book? What do I do?
Since book is authorized using your friend's ID, I am afraid you can't open the book using your user ID.
Either you have to use your friend's ID, or Join the accounts (this way both of you can open each others' books) or purchase the book again (it is the simplest, but costly solution).