When you install Bentley SewerCAD after you install AutoCAD, integration between the two is automatically configured.

If you install AutoCAD after you install Bentley SewerCAD , you must manually integrate the two by selecting Start > All Programs > Bentley > Bentley SewerCAD > Integrate Bentley SewerCAD with AutoCAD-ArcGIS-Microstation. The integration utility runs automatically. You can then run Bentley SewerCAD in AutoCAD mode.