PROBLEM
Arabic font does not display accurately in an image service in an HTML viewer. The text appears garbled or with mixed characters. The problem only affects the display of the labels and layers. Queries on these values return the correct text.
Image Server does not support bi-directional characters at version 4.x. The font does not display correctly because the Spatial Server incorporates some 3rd party code.
Get help from ArcGIS experts
Download the Esri Support App