Just right, outside the entrance to Blackrock Spire there is a few guards.  One of them, (the quartermaster I believe) has a letter, you have to get the letter from him.  AFter that you can read it and get the quest.  Do a full UBRS run and wack Drakk and touch the orb behind him.  Then you're attuned.

If you have the quest you're not attuned, if you can get the letter and get the quest, you're not attuned.  If you can't pickup the letter and dont have the quest, you should be attuned.