Yeah I kinda came to that conclusion. So using your projection(s), in the only projection that I know a web (base) map can be in, which is Web Mercator, where the Feature Service i'm editing against is GCS NAD 83, when I do:
The json sent to the server is
https://domain.com/veg/rest/services/Utilities/Geometry/GeometryServer/project?f=json&outSR=3418&inS...
Which returns error: {code: 500, message: "Error executing project", details: []}.
I've tried a few different EPSG values in
if (proj == "LATITUDE (Y) / LONGITUDE (X)" || leftlong == "-"){
var inpoint = new esri.geometry.Point(randx,randy, new esri.SpatialReference(4326));
gsvc = new esri.tasks.GeometryService("https://servername/arcgis/rest/services/Utilities/Geometry/GeometryServer");
var outSR = new esri.SpatialReference(3418);
var trans = 1188;
I'm just missing the boat on the RIGHT ones.....