A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Try this ... it's working here:
Insert a new VBA module into your file and paste in this code:
Sub OnSlideShowPageChange(ByVal Wn As SlideShowWindow)
ActivePresentation.UpdateLinks
End Sub
Add an activex control to the first slide (drag it off the slide so it doesn't show).
Make sure the Excel file is saved to the same folder as the PPTM.
Select the cell with the data you want to update in Excel, choose Copy then switch to PPT
Choose PasteSpecial, checkmark LINK, then choose to paste an Excel object.
Once it's pasted, you can enlarge it, move it around etc, but to change the font formatting, do it in Excel before copy/pasting.
Duplicate the slide. Set both slides to transition automatically, after whatever interval you want the update to happen at.
Close the Excel file, start the show in Kiosk mode.