If you are looking for a key for a legal copy of the software, you should use the following official channels: Hexagon Licensing Portal:
For older "LE" versions bundled with other software, the serial key is typically printed on the or included in the Release Notes of the primary software (e.g., Mathcad). System Administrators: intergraph smartsketch le serial key link
Users can obtain an LE serial key through various channels: If you are looking for a key for