Windows

Works best with a Windows computer, Windows phone or Microsoft Surface.  You can use the application to protect and view protected files. 

Mac

You can download the viewer for Mac OS.  The viewer app will allow you to read files that were shared with your Microsoft username email and allow you to protect images from your camera roll.  The protected files types that can be viewed on a Mac are limited to:  .rpmsg, .pdf, .ppdf, .pjpg, .pjpeg, .ptiff, .ppng, .ptxt, .pxml, and several other text and image file formats.  Which file extensions can I open with this app?

Supported File Types for Protection