Use the Update Building Site Definition command to update the building site object that was imported into the drawing. You use this command if the source architectural model has changed and a new ADSK package file was posted in the shared location. When changes are made to the package file, the out-of-date icon is displayed next to a building site item in the Prospector tree. You can update the building site object references without reimporting the object into the drawing.
The definition of the imported building site object is updated and all its references are redefined with new data.