Creating or editing a feature you can review edit and export the single vertices of the created or edited features using the vertex grid.

Open vertex grid from editing menu in WebOffice 10 R3 HTML client
You can review and edit the single vertices in the grid. Currently edited vertex is marked with a cross symbol.

View and edit vertices in grid - WebOffice 10 R3 HTML client
Using the export button it is possible to export the coordinates of the vertices in a specified format.

Coordinate export to CSV file
The format and file extension may be edited in <WebOffice 10 R3 web application>/client_workspace/JSXAPPS/weboffice/editgeometry_export.jsp.
Customize the following lines for your purpose:
//---------- begin // can get changed by admin -------------- //
String fileName = "WebOffice_geometryexport.csv";
boolean bShowHeader = true;
boolean bShowFieldId = true;
boolean bNormalizeCommaSeparator = false;
String fieldId_prefix = "";
String separator = ";";
//---------- end // can get changed by admin -------------- //