As previously announced on Thursday, March 19, 2015, "PlayStation 2" and Xbox 360 service for FINAL FANTASY XI will end on Thursday, March 31, 2016, at 7:00 (PDT) / 14:00 (GMT).

As such, "PlayStation 2" and Xbox 360 service will not be available after March 31, 2016, at 7:00 (PDT) / 14:00 (GMT) but your service contract will remain in effect.

Those wishing to continue their adventures in Vana’diel may do so via the Windows version on their SQUARE ENIX account.

Installing PlayOnline/FINAL FANTASY XI for Windows
http://sqex.to/v-7

You may continue playing FINAL FANTASY XI using your SQUARE ENIX account, PlayOnline ID, and PlayOnline password.