Yes, this is possible. To do so, click “Excel Links” in the top PowerPoint® menu bar within the entry “empower Charts” (NOT in the action bar directly above the chart). This will take you to the Excel Link Manager. Here all links with the external Excel® fill are displayed. Now simply click in the appropriate path (denoted as a hyperlink) to open and edit the Excel® file. After editing click on “Update” in your chart directly above it to update its content.