Activate Office 365 on all of your devices using your Microsoft account. This is the account you use to access Windows Live, ...

Activate Office 365 on all of your devices using your Microsoft account. This is the account you use to access Windows Live, Hotmail, OneDrive, Outlook.com, MSN, or Xbox Live. You can also sign in using the account provided by your work or school.If you don't have a Microsoft account, you can always create a new one using any email address.