Microsoft account

Microsoft Account (previously known as Microsoft Passport (note: Microsoft Passport is also the name of an unrelated feature introduced in 2015 to Windows 10 [https://technet.microsoft.com/en-gb/library/dn985839(v=vs.85).aspx]), .NET Passport, Microsoft Passport Network, and Windows Live ID) is a single sign-on web service developed and provided by Microsoft that allows users to log into websites (like Outlook.com), devices (e.g. Windows 10 computers and tablets, or Windows Phones), and applications (including Visual Studio) using one account.