Index: lams_gradebook/src/java/org/lamsfoundation/lams/gradebook/web/action/GradebookMonitoringAction.java
===================================================================
diff -u -r8da83506c9205fb2587a25df8e32ec59811d2e90 -r89ca0e8e23f9b0a9c38cede34a953697f31f0211
--- lams_gradebook/src/java/org/lamsfoundation/lams/gradebook/web/action/GradebookMonitoringAction.java	(.../GradebookMonitoringAction.java)	(revision 8da83506c9205fb2587a25df8e32ec59811d2e90)
+++ lams_gradebook/src/java/org/lamsfoundation/lams/gradebook/web/action/GradebookMonitoringAction.java	(.../GradebookMonitoringAction.java)	(revision 89ca0e8e23f9b0a9c38cede34a953697f31f0211)
@@ -354,7 +354,7 @@
 	ExcelCell[][] summaryData = gradebookService.getCourseDataForExcel(user.getUserId(), organisationId);
 	dataToExport.put(gradebookService.getMessage("gradebook.exportcourse.course.summary"), summaryData);
 
-	String fileName = organisation.getName().replaceAll(" ", "_") + ".xls";
+	String fileName = organisation.getName().replaceAll(" ", "_") + ".xlsx";
 	fileName  = FileUtil.encodeFilenameForDownload(request, fileName);
 	
 	response.setContentType("application/x-download");