"Digital Editions could not connect to the fulfillment server. Please check your internet connection." This is the message I get, yet my internet connection is good. Help!

I am getting the same error, in ADE version 2, version 3, and the latest 4.   None of the few posts that I've found on this have an answer that works.

It seems incredible that this problem has not been solved since it's been around for years.

I have "bought" a book and I have no way to get it to my reader.   I'm going back to paper books, this DRM stuff is totally arranged for the convenience of Adobe and sellars, with no regard for the support of customers.

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.

we dont have a answer