Access Xbox Live features with the Xbox UWP export option, including sign in, presence, achivements and title storage. Requires r374+.
See the 'Documentation' tab for details. Microsoft also provide lots of documentation.
You can (and should) use the latest version of Visual Studio when exporting for Xbox - there is no requirement to use VS2017 specifically. (That is only necessary to build the wrapper extension DLL itself, but if you're just using this plugin in a project, it's already built.)