When attempting to share a lidar dataset as a web scene from ArcGIS Pro 1.4, the following warning message is returned:
Warning: 24078: Layer's data source is not supported.
Publishing a web scene containing point cloud data from ArcGIS Pro 1.4 is a known limitation. Scenes with lidar data type cannot be shared directly from ArcGIS Pro 1.4 to ArcGIS Online or Portal for ArcGIS.
Note: It is possible to publish a point cloud scene layer from ArcGIS Pro 1.4 to both ArcGIS Online and Portal for ArcGIS 10.5 by creating a scene layer package and manually uploading the point cloud scene layer. However, the point cloud scene layer cannot be displayed in the Portal for ArcGIS scene viewer due to a limitation of the ability of the scene viewer to render the point cloud data.