Not sure where the user files for XIV are stored, but for XI, since they were stored in a separate folder from the rest of the app, I set up a Dropbox account, and made a virtual link of the user folder inside the dropbox folder. That way any time a change happened in the user folder it was updated in the dropbox folder, and any time there was an update in the dropbox folder, the user folder was updated too.
Then I made the same virtual folder links on all my computers that I played XI on, and that keeps your user files (macros, map markers, inventory sorting, etc..) always be in sync with each other.
Perhaps it's possible to set up something similar for XIV if they store the user data in a separate folder.