to quote myself from the other thread on this topic:

Quote Originally Posted by Molly_Millions View Post
official steps to find your invite:

1. check your spam folder
2. double check your legacy status
3. check the email address associated with your square enix account
3a. if you used a different email address check there
3b. check the spam filter on your second email address
4. recheck your original spam folder
5. realizing that everything above is in good order and you still haven't seen the invite, freak out!