we dont have a answer
I started having the same problem this week. ADE had worked fine until now. Like you I started by not being able to connect to the fulfillment server. I tried all the fixes, uninstalled, reinstalled, rebooted, nothing worked, couldn't deauthorize my computer so resorted to the control shift d option, that deauthorized, but then I couldn't authorize my computer, got the error could not connect to the activation server. I went through all the uninstalling, reinstalling several times, and was getting very frustrated. Finally I went into my admin account, ADE showed authorized there, tried to add a borrowed library book & it told me that I had to authorize, so I clicked on help, deauthorized, then authorized, the book transferred, plugged in my Kobo Glo & added the book to it. When I logged off of my admin account & went back to the account I normally use, my ADE still shows that it isn't authorized & the book I added is not in my library. So I guess I have to use it from my admin account on my computer. It is kind of annoying, but at least I found a fix that actually worked for me.
I've got exactly the same issues, and followed the same path to frustration. I contacted Adobe Customer Care (who obviously don't since it's a free program) who directed me to the forums with no solution.
| found the following thread Authorisation - never completes! where bethanyp63279625 mentioned that she needed to restore Internet Explorer to the default settings to allow Digital Reader to connect with the Adobe server. I normally use Firefox, but called up IE and set as the default browser, and after about 3 tries it suddenly authorised my PC correctly. I've added a book authorised in 2013 to the Adobe library and it opens correctly.
Hope this helps.
Could you please explain, what exactly you did after you called up IE?
Thanks a lot!
Sorry - I went back to using Firefox & haven't used IE again until I hit another ADE snag!
From what I can remember, I just opened IE and set it as my default browser. Then went to the ADE download page and logged on with the email address/password I used to download ADE, opened my ADE ereader software on my pc, and clicked on Authorise Computer. I think I got the same error message the first time, but I just clicked again and then it recognised whatever it needed to and authorised it ok. Only problem since then has been with an upgrade (from v4.0 to v4.5 - kept re-adding the same 6 books to my library for some reason so I had to delete & go back to v4.0).
That's all I can remember, hope it helps.