MIP External Classification not Removing

Question

Hi,

We deployed the MIP policy, but the client was using the ICT classification product before. That's why there are headers and footers of the ICT product in the old files. I found and removed the names of these header and footer contents on Word, but the names of these figures do not appear on Powerpoint and Excel. So I don't know how to remove it. Is there a way to remove these headers and footers?

When I enter the Selection Pane in Powerpoint, no value appears. But there is no header or footer value in the selection pane, so I cannot use the "PowerPointShapeNameToRemove" command. Because I need to know the name of the shape in order to use the command, but is there a different place where I can learn the name of this shape or is there a different command that I can use apart from this?

Have a great day.