Microsoft released SharePoint 2016 Beta 2 on November 18, 2015, introducing new features like improved mobile experience, document library accessibility, and support for larger file uploads. The MinRole feature allows administrators to define server roles in farm topology, optimizing performance and stability. Additionally, enhancements in sharing, search capabilities, and integration with Office 365 were implemented, but note that there will be no in-place upgrade to the final release from this beta version.