Microsoft has now released Windows 10 Build 10586.456 to Release Preview Ring Insiders on Windows 10 version 1511. You can read what the build brings in terms of changes, fixes and also known issues by clicking here. While the Build is now officially available to Insiders only, one can now download the CAB files for KB3170411, the cumulative update that brings Build 10586.456 via Windows update and get the update on any PC running Windows 10 Mobile Build 10586.XXX.

Windows 10 Build 10586.456 (KB3170411) CAB Files: