"Using Microsoft's Office Web Apps or Office 2013, you can create a URL of any document that you store online. You can then e-mail that URL to anyone who needs to view or edit your file. Previously, that process required your collaborators to sign in with a Microsoft account before they could tweak your document. Now that restriction is gone.SkyDrive users can now share Office documents with anyone | Webware - CNET
Users who receive the URL to your document can click on it to view the file in Office Web Apps. From there, they simply click on a link in the Web app to edit the file in the browser. The file opens in the associated Office Web App without prompting for a log-in account, where your collaborators can then edit and resave the document."
Saturday, February 09, 2013
SkyDrive users can now share Office documents with anyone | Webware - CNET
No Passport required...