Combining areas for multiple polygons to create one site is no longer available for feature layers from ArcGIS Online in the Business Analyst Online web app.

Additional Information

Workaround

Make two or more polygons into sites:

1. From the added web layer, select one polygon.
2. Click Create Site.
3. On the next window, click Create site.
4. Click Create a new layer. Type in the name of the layer, and click Save.
5. Do the same for the other polygon but this time in the saved created Sites. Click "Choose a layer for the new sites," select the created layer in step 4, and click Save.
6. In the left panel, uncheck the web layer and have only the created layer in step 4 checked.
7. Click on one of the polygons from the created layer in step 4, hold shift, and select the other polygon.
8. Click on "Create a single polygon site from these sites."

Steps to Reproduce