This page describes the Orbit 3D Mapping Plugin for ArcGIS Pro.
Requirements
See Requirements for Orbit 3DM Viewer and Plugins.
Download
Download the ArcGIS Pro plugin installer from the Orbit website, https://orbitgt.com/3dm-plugin/.
Run the .exe file and follow the steps of the wizard. One of the steps is to specify a target location where to save the files.
Install Orbit Plugin
This plugin can be installed for offline use, see Plugin configuration for Local Viewer SDK.