We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
what khronokai said... turn 10 has been having lobby joining issues for awhile and there still trying to figure it out. if you go to forzamotorspoet.net there is a thread in forza general discussion about this, you can go there and provide them with soe
input on what is happening on your end. cars your using races your trying to join, what time your playing and so on.