UPDATE – July 31st: Xbox One Preview Program Members that own the Call of Duty: Advanced Warfare Season Pass should have Advanced Warfare Reckoning DLC show up in their Downloads List. More information on the Preview Program is available here.
If you do not see it in your downloads list, then go to My Games and Apps -> Hit “Start” button on Call of Duty: Advanced Warfare game -> Manage Game -> Ready to Install. Reckoning should be under Ready to Install.
Activision Assist has just posted an article on their support site stating that Xbox One Preview Program members will be able to get early access to Advanced Warfare’s Reckoning DLC maps, but there are some limitations. According to the article, players will be able to play the maps only in local private matches, and the Exo Zombies maps will not work because it’ll need a title update, which is coming August 4th.
Even though the Reckoning DLC Pack will be available to download from the Xbox Live store prior to its release, access to the entire DLC pack will be limited until it is officially released on Tuesday, August 4th.
The four new Reckoning DLC maps will not be accessible for online multiplayer. However, these new maps can be played in local multiplayer mode.
Attempting to access Exo Zombies Part 4: Descent will cause the game to crash. The latest Exo Zombies chapter requires a title update that will be released in conjunction with the Reckoning DLC Pack on August 4th.
Sledgehammer Games and Activision have not officially stated yet exactly how this will work…we’ll let you know when we do.
SOURCE: Activision Assist