In my experience - Box Sync on Windows 10 - I often run into messages "N files could not be synced" - usually because a Mac user saved a file with a name Windows can't handle. If it's only one file, it tells me the name, but if it's more than one, it only shows the number. I would go into Box to rename the files - however, I cannot find any way to identify the offending one. Would love an option on Box Sync that showed the set of files that are throwing sync errors.