Which file types will generate rich previews when shared from a cloud storage service to Workplace?

PPT, PPTX, DOC, DOCX and PDF files will generate a preview, with each page being shown as an image. Google Docs and Slides will also generate a preview. Other file types supported by your service provider will be shown as an icon with a title of the file or document.
If enabled, files and documents stored in Box will render in Box's preview window on web.
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