Sign in with the account you use for SkyDrive, Xbox LIVE, Outlook.com, or other Microsoft services.
Sign in with the account provided by your work or school to use with Office 365 or other Microsoft services.
Put Office on up to five computers. Get 20 GB of extra storage in SkyDrive and 60 anywhere minutes with Skype. Use Office anywhere. These are just some of the things you get with your Office 365 Home Premium subscription.