I am using ArcMap 10.3.1 and have downloaded the PostgreSQL 9.3.5 files from MyESRI.com. PostgreSQL is installed locally for testing purposes. I have everything working smoothly and am attempting to publish the data for use on a tablet in the Esri Collector app. In order to do this I have to register the database with ArcGIS Server.
I edited the pg_hba.conf to allow remote connections, since ArcServer is installed on another machine. When I attempt to register the database I get he error in the following screenshot. I have attempted an exhaustive Google sreach for a resolution with no success.