When using the geotagged photos to points tool, about half of my photos are rotated 90 degrees when viewing them with the HTML pop up. Is there a way to manually rotate them? Or a reason why the tool is automatically rotating the photos 90 degrees. I am using ArcGIS 10.7.1
The tool doesn't rotate your photos, much less only some of them.
The tool takes the rotation from the photo's EXIF data. If there isn't an entry for the rotation, the field in the resulting feature class will have the value 9999. Wrongly rotated photos result from wrong entries in the EXIF data.
What you can try: