The first thing you need to do is save your point cloud as las file in 3DSurvey.
Then we open it in Autocad ReCap and save it as rcp file.
Next, we open Autocad and type in PCATTACH (point cloud attach command). We find our recap file and select it.
At last click ok, and that is it.
The process was well explained in our webinar, so I'm also adding the link:
https://youtu.be/rzjh2_VYAFg?t=300