I am using the esri-leaflet plugin to connect to an internally hosted Arc gis server. I have tried using a basemap or tilemap implementation but get the same results with both. The problem is that I am only seeing North America and South America with the same tile starting over again at the prime meridian. I can find the tiles for europe and Asia by looking at them on the arcgis server so I know they are there. My arcgis server (set up by someone long gone) is saying we are using spatial reference of 4326. Leaflet Esri plugin states this -

Your map service must be published using the Web Mercator Auxiliary Sphere tiling scheme (WKID 102100/3857) and the default scale option used by Google Maps, Bing Maps and ArcGIS Online. Esri Leaflet will not support any other spatial reference for tile layers.

My question is am I able to use this Esri leaflet plugin or do I need the proj4Leaflet with a new CRS projection setting? I think I am getting tripped up on the tiling scheme of this pre-existing ArcGis server and don't know how to get a leaflet 2D map to work with it. Thanks for your help!

Some example code -

var crs = L.CRS.EPSG4326;
var map = L.map("map").setView([1,1],1); //just picked a random spot. 
L.esri.tiledMapLayer({
  url: myUrl,
  crs:crs,
  minZoom:0,
  maxZoom:12
}).addTo(map);

I am using the esri-leaflet plugin to connect to an internally hosted ArcGIS Server. I have tried using a basemap or tilemap implementation but get the same results with both. The problem is that I am only seeing North America and South America with the same tile starting over again at the prime meridian. I can find the tiles for europe and Asia by looking at them on the arcgis server so I know they are there.

My ArcGIS Server (set up by someone long gone) is saying we are using spatial reference of 4326.

Leaflet Esri plugin states this -

Your map service must be published using the Web Mercator Auxiliary Sphere tiling scheme (WKID 102100/3857) and the default scale option used by Google Maps, Bing Maps and ArcGIS Online. Esri Leaflet will not support any other spatial reference for tile layers.

Am I able to use this Esri leaflet plugin or do I need the proj4Leaflet with a new CRS projection setting?

I think I am getting tripped up on the tiling scheme of this pre-existing ArcGis server and don't know how to get a leaflet 2D map to work with it.

Some example code -

var crs = L.CRS.EPSG4326;
var map = L.map("map").setView([1,1],1); //just picked a random spot. 
L.esri.tiledMapLayer({
  url: myUrl,
  crs:crs,
  minZoom:0,
  maxZoom:12
}).addTo(map);