We have variety of 3D data: Point Cloud, CAD Models,SLPK, LAS. What 3D data can be published to portal and how.
Is the arcgis pro the best route?
Yes, I would use ArcGIS Pro to share 3D content to Portal. For supported 3D content in ArcGIS Pro, see this help topic:
Import 3D Files—Help | ArcGIS Desktop
Hope this helps,
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