iPhone Photo Transfers on isolated networks

G'day,

Trying to come up with some sort of Phone Transfer solution, but due to tight restrictions in our environment, we are faced with this problem almost once a week.

We are a Windows environment.

Staff take photos on their phone and want to upload to computer.

Our Policy prevents USB access (and even with read-only one way mode, it still becomes issues due to the way the folder structure on Windows/iOS works) , and Guest Wi-Fi is isolated network so we can't use Phone Transfer Apps over Wi-Fi to transfer photos to the staff's local Corporate PC.

Has anyone managed a better solution to this?

I'd love to be able to say, download this app upload your photos, and on your computer go this website, and download photos.

Thanks!