Converting multipatch layer into polygon layer using ArcGIS Desktop?

I have a shapefile which reads its geometry type as "multipatch". I tried to perform the clip function using this layer and it does not work.

How can I convert this multipatch layer into a polygon shapefile?

I am using ArcGIS 10.3.

Answer

If you have a 3D Analyst license, there is a tool in the 3D Analyst Toolbox called "Multipatch Footprint". Using this tool will

Create polygon footprints representing the two-dimensional area occupied by a multipatch feature class

See tool help at Multipatch Footprint - ArcGIS Desktop Help

You can find the Multipatch Footprint tool in ArcToolbox > 3D Analyst > Conversion > From Feature Class > MultiPatch Footprint

You just point to your Multipatch file as in put and specify an output to save the polygons to.