The 'Purpose of operation' field is located under Configuration > Field. Please choose the exploration field(s) and click the Installation tab.
Please make sure that the Purpose of operation is set to 'Exploration drilling' for the exploration operations. This will enable the automatic update of field and installation name in the EW report. EW requires the field name for exploration drilling to be 'Leteboring
This will significantly ease the use of the automatically generated XML reports for the EW reporting.