Addendum
I did not mention this in the article, but it is probably worth noting -
When you send invites, the Microsoft Online account used must match the log-in account the invite is sent to. This means if you send the invite to:
joesmith@mycompany.com
And they log into Skydrive using a Microsoft account:
joesmith@msn.com
Or any other account than one that matches the address on the invitation, they will not have access to the shared OneNote document.
It is fairly easy to make a Microsoft account that matches your company e-mail address - but this can make it difficult to make sure you've sent the invite to the e-mail address that matches the Skydrive log-in account of the intended recipients. If a collaborator complains that they can't get to the document after receiving an invitation, confirm that the e-mail they log into SkyDrive using matches the account the invitation was mailed to.
