I am using Parallels 10 on and iMac with Windows 8.1 as the guest. I see that Parallels 10 integrates OneDrive and DropBox into the Windows file system, but it does not do the same for Box. I have gone to Box (having tried the other two) because it is the only one that properly handles the newest iWork format. But I also use it to sync a lot of MS Word files. It would help if Parallels would integrate Box in the same way it did the other two cloud syncing packages.