To support the export of single objects, new parameters were introduced to the export api:

com.openexchange.importexport.exporters.CSVContact Exporter:
(id - object id of the object to export)

com.openexchange.importexport.exporters.ICalExport er:
(id - object id of the object to export)

com.openexchange.importexport.exporters.VCardExpor ter:
(ids - a batch of ids to support crossfolder export)