No embedded fonts notice
"The PowerPoint version you are using is unable to read this presentation’s embedded fonts. This may reduce readability of some texts."
You may have seen the following notice on a PowerPointⓇ presentation:
The meaning of this notice is that:
Presentation Font Embedder was used to embed fonts into the presentation file that you are viewing.
The PowerPoint version (or any other viewer) that you are using is not capable of displaying fonts that are embedded in presentation files.
The text that was written in the custom fonts is still in the presentation and should be readable. However, it does not appear in the font that the author has intended it to.