Good afternoon, and thank you for posting on the Final Fantasy XIV Technical Support Forums.
While this is not a technical issue, we may still be able to assist. The Eorzean Symphony does come with an item code, however, it can only be applied to one character.
Please be aware that there is no standard for the kinds of codes that are given out on the Online Store. Past codes may have been account-wide codes, but that does not mean every one of them will.
If you need further assistance, you can contact the Square Enix Support Center directly. The Support Center can be contacted via phone, chat or email support through the Square Enix Support Center website. Please use this link to direct you to the Final Fantasy XIV support website:
http://support.na.square-enix.com/main.php?id=5382&la=1
Please note live service is available Monday through Friday, 9:00 – 18:00, Pacific Time (Excluding holidays).
We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!