Microsoft is now testing Windows 10 build 17116 internally. The new Windows 10 Spring Update build 17116 (10.0.17116.1 rs4_prerelease.180305-1431) was compiled on March 05, 2018.
Windows 10 Spring Update preview build 17115 is now available for Insiders. In addition, the insider preview build includes new privacy settings with a new design to help customers make focused choices about their privacy and offers two new settings for Inking & Typing and Find my device.
The ISO files for Windows 10 build 17112 are also now available for download. You can download it from the link below.