It's in CTP at the moment, technical preview. A google search for 'sql 2017 download' should get you the relevant MS download page , I don't have the link onhand.
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass