Simple Steps to change icon POI categories
1. Go to Points of Interest then Manage categories.
2. Select the POI category.
3. There’s an option called “other icon”, click that option to open up new Icon Picker.
4. Select the Icon or choose another Icon Category in the drop down menu at the top.
5. Click on Use icon to select the displayed icon the selected POI category.
6. Save your Icon selection.
NOTE: Make sure you have _EditLocationCategory and _UseIconCategory privilege.