 Microsoft account Microsoft account is a service that lets you sign in to Microsoft products, web sites and services, as well as those of select Microsoft partners. When you create a Microsoft account, we ask you to provide certain information. When you sign in to a site or service using your Microsoft account, we collect certain information in order to verify your identity on behalf of the site or service, to protect you from malicious account usage and to protect the efficiency and security of the Microsoft account service. We also send some of this information to sites and services that you sign in to with your Microsoft account. 