Available with Standard or Advanced license.
The raster associated with the mosaic dataset item may not be georeferenced.
At least one of the mosaic dataset items is not georeferenced properly. This usually means that the item is missing a spatial reference system or does not have valid coordinates.
Since the mosaic dataset item is not in the correct geographic location, the item should be removed from the mosaic dataset.
To select the appropriate item, right-click on the warning message and click Select Associated Raster. To remove the selected item, right-click on the warning message and click Remove Rasters.