That means that it was incredibly low stocked.

How can it be sold out when it never cracked the Top 20?

Im saying it met microsoft expectations not how much it sold.

How could Microsoft have expected the game to sell less than Forza 5 with more Xbox Ones on the street? It doesnt make any sense.

What's wrong with that sentence? 

Microsoft do not sell on Amazon. If you mean Amazon themselves sold out, then naruball's  comment still stands. 

Well the stock microsoft gave to amazon sold out so that emans it reached expectations.

Launch game

Microsoft doesn't "give" stock to retailers. They supply as much as the retailers order. If a game sells out at a certain retailer (FYI as far as I know only the XBO bundle sold out, not the game itself) that only means it met the expectations of that specific retailer, and doesn't say anything about it meeting the expectations of Microsoft themselves. Microsoft could expect retailers to order a million copies, then they only order 200k copies, and then the game sells out. That wouldn't mean that it reached Microsoft's expectations, just that it reached (and surpassed) the retailers' expectations. So in the end we know nothing about wether or not Forza 6 has met Microsoft's expectations.

Based on which detailed sales data you are probably willing to share with all of us?

Your comment makes no sense.

First if a item is out of stock in a store is because the store odered less than what they could sell... there is nothing to do with MS expectations.