https://www.polygon.com/2018/4/25/17279598/pubg-miramar-xbox-one-test-server-release

Xbox One players are finally about to get their hands on Miramar, the second map for PlayerUnknown’s Battlegrounds, when it launches on the brand new PUBG test server version of the game today, April 25.

According to the official patch notes released by the PUBG Xbox development team, this test server patch will include a whole range of performance and stability fixes for the game, as well as Miramar and the exclusive weapons and vehicles that are only available on that map.