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.