I have been trying the new SharePoint Server 2016 bits for few months through the TAP programs and now time has come to talk about in public.
Microsoft released SharePoint Server 2016 preview build 16.0.4316.1217 on 10th August for TAP participants and now the same build has been released to public.
It’s pointless recreating the same blog and visit Bill Baer’s post about to get more information on the SharePoint Server 2016 IT Preview.
Announcing availability of SharePoint Server 2016 IT Preview and cloud hybrid search - https://blogs.office.com/2015/08/24/announcing-availability-of-sharepoint-server-2016-it-preview-and-cloud-hybrid-search/
SharePoint Server 2016 IT Preview Reviewer Guide - http://www.microsoft.com/en-us/download/details.aspx?id=48713
Download SharePoint Server 2016 IT Preview - http://www.microsoft.com/en-us/download/details.aspx?id=48712
This preview meant and focuses on infrastructure new features and enhancements and I believe that’s why they call is as IT Preview.