A Microsoft account or MSA[1] (previously known as Microsoft Passport,[2] .NET Passport, Microsoft Passport Network, and Windows Live ID) is a single sign-on Microsoft user account for Microsoft customers to log into Microsoft websites (like Outlook.com), devices running on one of Microsoft's current operating systems (e.g. Windows 10 computers and tablets, Windows Phones, and Xbox consoles), and Microsoft application software (including Visual Studio).