Microsoft announced today the Azure AD Basic is available.  It includes four additional features not available in Azure AD Free version.

Company branding to match your internal LAN’s styling and logo.

Group-based application access for your cloud hosted apps.  With the ability to query your own directory to build and populate groups or build them in Azure.

Self-service password reset to allow users the ability to reset their own passwords without contacting IT.

SLA 99.9% (3 Nines) guaranteed uptime of 99.9%.  That equals: 1m 26.4s/day or 10m 4.8s/w or 43m 49.7s/mo or 8h 45m 57s/y.

Azure Active Directory Basic is now GA! - Active Directory Blog - Site Home - TechNet Blogs