I been experiencing issues with my Adobe ID. I had an account that I don´t remember the password for (or which email address I used to sign up - in fact I can’t recall using one at all). I used this account to read eBooks bought online on my computer. I have now bought an eBook-reader and to sync the books I already own with the reader I must use my old Adobe ID account. I have been in contact with the company selling the books and the reader and they said that this is a problem that only you can solve. I am writing this from my new Adobe ID account.