As of March 31st, 2012 all Halo data will officially be managed by 343 Industries. According to an update today, Bungie informed fans that the transition, which began last summer, should be completed by the March deadline at which point Bungie will no longer be able to update game stats and player service records, to host new user generated content, or to operate the Bungie Pro service.
After the transition, all future Halo support, including any replacement functionality, will be provided by Microsoft and 343 Industries via Halo Waypoint.
"Thanks for making the Halo-era version of Bungie.net more successful than we could have possibly imagined. You complete us," Bungie wrote to fans.
Bungie will preserve all existing historical Halo data on Bungie.net for as long as the Internet and Bungie's data storage systems remain functional.