FFXIV Steam Users Will Be Required to Link Square Enix Account

Square Enix provided clarification on linking Steam accounts and more detail about how this works across different regions.

FINAL FANTASY XIV Online on Steam

This Square Enix account cannot play FFXIV · Issue #789 · goatcorp/FFXIVQuickLauncher · GitHub

Final Fantasy XIV Will Require Steam Account Linking Starting Next Month

XIVLauncher FAQ

Final Fantasy XIV will add Steam account linking in early March

Introducing Steam Version Account Linking : r/ffxiv

Final Fantasy XIV Steam Error Causing Major Problems - Gameranx

Square Enix ID Locked on launcher to wrong ID How do I change this? : r/ ffxiv

FFXIV Introduces Steam Version Account Linking - News - Icy Veins

FINAL FANTASY XIV: Endwalker on Steam

SQUARE ENIX The Official SQUARE ENIX Website