Here's my hack - it's not ideal but it does the job.
Every day users are dumping photos into a file folder on the network. I have a small .py that runs GeoTagged Photos To Points—Help | ArcGIS for Desktop on the entire folder, and I've got an .mxd with the Photo Points saved somewhere the users can access it. And as long as (ArcMap and) the 360 degree viewing software is installed on the client, they're able to pan and zoom when they click on the photo point hyperlink in ArcMap.
Future state will be to have the photos on an actual web server with URLs, which will allow us to use a web application to access the photos.
Hope this helps - feel free to PM me with questions on the workflow.