Use Box with Pages on Mac
You can collaborate on Pages documents stored in Box. Just like when you’re collaborating on a document stored in iCloud Drive, everyone can work in real time and see changes as they’re made. When documents 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 Pages documents while signed in to your Box account, see the Apple Support article on using iWork documents online in Box.