In Strategy Web 9.4.1 the ESRI map widget will display markers as a diamond, like shown below.

It is possible to use a custom image instead of the default marker.
ACTION:
Follow the instructions below to use a custom image as a map marker on an ESRI map widget in a report or Report Services document:
Note: The following steps are only applicable when the ESRI map widget is configured to display Image Markers, like shown below.







Note: Custom images only apply to Report Services reports and documents. Customizing map markers on an ESRI map visualization in Visual Insight is not supported.
KB47979