A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
In PowerPoint for Mac on your desktop, choose PowerPoint>Preferences>Save. Check the option beside Embed fonts in the file. Then check Embed all characters (best for editing by other people). After saving, upload the file to Sharepoint and see if the font displays correctly. This method works with most professional fonts by major type foundries, but not necessarily with free fonts you find on the internet.