Box is currently unable to save any new files directly from office mobile applications to Box fileserver locations, and the files disappear into the void when attempting to do so. After a few wasted hours of troubleshooting Senior Box Support indicated this is a result from a lack of support for mobile co-authoring functionality. An error message at the absolute bare minimum to instruct users to only save data locally would be the expectation when a file cannot be saved before data loss occurs.