Batch import multiple subscribers using a CSV formatted file. NB! There is a file size limitation of 100 Mb so files larger than that should be in .zip format. Also note that the method will return the Import ID, and the status of the import can later be polled using the GetImportStatus method. Click here for detailed explanation of format and considerations. External files are downloaded asynchronously. They should thereby be kept at their location until the GetImportStatus method reports that the import is completed. The Xml files cannot be encrypted or password protected. Use DemographicDataMapping parameter to selectively specify import file columns from 7 to 107 to map to demographic data fields from 1 to 100. If DemographicDataMapping is provided, not mapped demographic data fields will not be imported.
2015-12-07 v3: Updates to do asynchronous download of external file for increased API performance. External files should now be kept at their location until the import is completely done.
2016-06-15 v4: Introduce DemographicDataMapping parameter for mapping import file columns to demographic data fields.