Name on Alliance channel

Hello, i'm new on this game. they i joined an alliance but when i speak on the alliance channel, its not my in-game name but my Id name(with letters and number) How can i change it to have my name appear on this channel. I'm from France Thanks

You can't change it to show your character name. You do know you can change your ID Name though, right? You get one free ID Name change to not have it as PN4578598 or something.