Friend has forgotten his PlayOnline password, can't recover it

I had recently convinced my best friend to rejoin FFXI after years of inactivity. He went through the whole procedure of making a Square Enix account and buying Crysta for payment, but he's stuck on linking his old PlayOnline account to his new Square Enix account. He can't remember his password.

He also tried Square Enix's information center for help. The only even remotely relevant FAQs on the matter had to do with recovering the password for his Square Enix account. (which he has, having just made one) Even emailing them didn't help, he also got more back about his Square Enix account.

Is there anything he can do to get his old account back?

Totema,

As noted in the general forum rules, this forum is for the discussion of technical issues. In the future, please contact the SQUARE ENIX Support Center directly for any account or billing related issues. For assistance with account-related issues, your friend will need to contact us directly through the SQUARE ENIX Support Center for your region. Unfortunately, since this situation does not involve any technical trouble, we have had to lock the thread.

The SQUARE ENIX Support Center for North American accounts can be found at this link:
SQUARE ENIX Support Center

The SQUARE ENIX Support Centre for European accounts can be found at this link:
SQUARE ENIX Support Centre

The SQUARE ENIX Support Center for Japanese accounts can be found at this link:
SQUARE ENIX Support Center