Microsoft is a part of a growing gang of hip firms that have wised up to the importance of the two-step. Apple took it up last month and Google has had it as an option since 2010 .
http://www.theinquirer.net/inquirer/news/2262414/microsoft-offers-outlook-skype-and-xbox-users-twostep-authentication
http://www.theinquirer.net/inquirer/news/2262414/microsoft-offers-outlook-skype-and-xbox-users-twostep-authentication
