Use the filters as necessary to display items in the list tab's grid.
Green select the Stock Items you wish to report on.
Display the drop-down 'Other Actions' menu either by pressing F9 or clicking the down arrow immediately to the right of the green circle with a white cross icon at the top of the button bar.
Select 'Export' from the 'Other Actions' menu.
Select 'XML Stock Status (All)' from the fly-out menu.
A 'Stock Status XML Export' dialog box will appear, select the destination and name the XML.
Press Ctrl+S or click to save the generated XML file to disk.