This is not possible with the current store.
It's certainly possible to do this by using the excel API or a 3rd party API, but then we have issues with licensing and distribution of NBS. So there are no plans to add this functionality at the moment. But if we find a open source project that makes it easy for us to do it, then we might consider it for the next version of the reporting system in NBS.
For now I think you'll have to just educate your client. :-)
It's certainly possible to do this by using the excel API or a 3rd party API, but then we have issues with licensing and distribution of NBS. So there are no plans to add this functionality at the moment. But if we find a open source project that makes it easy for us to do it, then we might consider it for the next version of the reporting system in NBS.
For now I think you'll have to just educate your client. :-)