You use a Microsoft account to sign in to the Windows Azure Management Portal when you configure Microsoft Dynamics NAV for use of Windows Azure Active Directory (AAD) as authentication mechanism, or if you deploy Microsoft Dynamics NAV on Windows Azure.
To obtain a Microsoft account
Visit the sign-up page.
For more information about Microsoft accounts, see the Windows Live ID site.
See Also
Concepts
Use ACS to Authenticate UsersAuthenticate Users with Windows Azure Active Directory
Users and Credential Types
Microsoft Dynamics NAV as an App for SharePoint
Preparing for Deploying Microsoft Dynamics NAV on Windows Azure
Deploying Microsoft Dynamics NAV Using the Example Scripts
Deploying and Managing Microsoft Dynamics NAV 2013 on Windows Azure