I have Adobbe Digital Editions 2.0 on my dekstop computer. I am trying to authorize it (Ctrl-Shift-U), but for the past two weeks I have been getting this as an error message:
Activation server error
Digital Editions encountered an error on the activation server.
I have tried setting up new Adobe IDs and have even tried uninstalling and then reinstalling Adobe Digital Editions.
try editing your account details: http://adamantventures.com/blog/adobe-digital-editions-activation-authorization-problems/
you also may be able to resolve the problem by clearing your adobe.com cookie from your browser.
I had a similar problem and this worked for me (the IE assistance came from a helpful person in the forum)