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One of the safest, easiest ways to publish and share PowerPoint presentations online is to use Microsoft Office Live.
Although the Microsoft Office Live Workspace is still in beta, it’s open to anyone who wants to share their documents online.
You do need to have a Office Live account to use this option.
If you don’t have one yet, you can
set up an account here for free.
My favorite thing about Microsoft Office Live is how seamlessly it works with the PowerPoint software. You don’t have to keep tabbing back and forth between your document and browser. Instead, you can perform the functions of opening online documents, editing, and saving all from within PowerPoint.

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To access Microsoft Office Live from PowerPoint, click on the Office button. Two of your choices on this panel will be Open from Office Live and Save to Office Live. Choosing either of these options will offer you the chance to sign in to Office Live if you haven’t already done so. From here, all other options work just as standard Open and Save commands do, with the only difference being that you are working with PowerPoint files on the Office Live site rather than your own hard drive.