Multiple Geometry Links for CAD Integration
With CAD Integration, you can utilize geometry from multiple upstream sources. The source can be from any CAD or Ansys Electromagnetics product. This creates a user-defined model (UDM) for each geometry source.
For example, the following figure shows a DM Model, a Maxwell model, and ProE (Creo Parametric) model linked to HFSS in Workbench, and displayed in the HFSS History tree as three UDMs.

Related Topics
Ansys Electromagnetics CAD Integration Through Workbench
CAD Integration and Geometry Sharing
Bi-Directional CAD Integration
Important Geometry Options for CAD Integration