Azure Active Directory (AD) and Microsoft Account (MSA)

Microsoft is taking another step toward bringing together its Azure Active Directory (AD) and Microsoft Account (MSA) identity services

http://www.zdnet.com/article/microsofts-new-unified-log-in-experience-is-now-in-public-preview/?lipi=urn%3Ali%3Apage%3Ad_flagship3_feed%3BlsbeUu95Qy%2BN7mOlEDWuog%3D%3D