Use Box with Keynote on iPad
You can collaborate on Keynote presentations stored in Box. Just like when you’re collaborating on a presentation stored on iCloud, everyone can work in real time and see changes as they’re made. When presentations are stored in Box, you need to use the Box controls to set sharing options or stop sharing.
For instructions on previewing, editing, and creating Keynote presentations while signed in to your Box account, see the Apple Support article on using iWork documents online in Box.