It is automatically getting pushed out via Windows Update to end users as part of today’s “Patch Tuesday”. Corporations that manage their own patching are *encouraged* to evaluate & distribute this patch at their earliest convenience.
- Cumulative update for Windows 10 Version 1511 and Windows Server 2016 Technical Preview 4: April 12, 2016
The individual patch (3148527) itself is documented here:
- Security Update for Microsoft Security Bulletin MS16-047 – Important
SAM and LSAD Remote Protocols (3148527)