Sharing Files at Windows Live and SharePoint Web Sites
Part of the Office 2010 Web Apps For Dummies Cheat Sheet
Because the files you work on with the Office Web Apps are stored online, not on your computer, many people can access and edit them. Although Web App file sharing isn't fully available worldwide (yet), many people can open the same file in an Office Web App and edit it, in some cases at the same time as others.
This ability to share files is the primary purpose of the Office Web Apps. In and of themselves, the Office Web Apps don't offer enough features and functions to be worthwhile using. But being able to use the Office Web Apps to share files with others makes them unique and valuable.
Windows Live is a collection of free online services and software products offered by Microsoft. One of these services, called SkyDrive, is for storing files online. After you sign in to Windows Live, you can go to SkyDrive, open an Office Web App, and use it to create and edit Word documents, Excel worksheets, PowerPoint presentations, or OneNote notebooks.
The other way to use the Office Web Apps is to do it by way of a SharePoint Web site. SharePoint is a Microsoft software product for storing and sharing files on a company network.
Running the Office Web Apps at Windows Live doesn't cost one red cent. You can sign up for free and try the Office Web Apps in a matter of minutes. To run the Office Web Apps from a SharePoint Web site, you must have permission from a network administrator.