Invitation emails are sent out periodically throughout the week, so you may need to wait a few days until an invitation is sent to you. Furthermore invitation emails are sent to the email address registered on the Square Enix account, so please be sure to check the inbox of the email account registered to your account.
Players to be invited to return must have a service account that has been inactive for at least 90 days (including the free play period). Those who fail to meet this requirement will not receive an email even if they have been invited to return.
If you refused the invitation email or opted out by mistake, but wish to receive invitation emails in the future, then you can contact us at the Support Centre to have the settings changed.