Microsoft today announced that there are over billion documents stored on SkyDrive and as Office 365 Home Premium got released few days back, you can expect the number to grow up fast. Microsoft also announced that they are making it even easier for people to share and edit documents in the Office Web Apps by not requiring them to sign in with their Microsoft account.
Now, you can either choose to share the document to someone without requiring them to sign-in or use ”Require user to sign-in” check box for the other case. This is a neat feature that will pull in more users to the service.
Source: Windows blog