Technical support for all Windows Azure services released to General Availability, including Multi-Factor Authentication, is available through Windows Azure Support, starting at $29/month. Billing and subscription management support is provided at no cost.
We guarantee 99.9% availability of Windows Azure Multi-Factor Authentication. The service is considered unavailable when it is unable to receive or process authentication requests for the Multi-Factor authentication provider deployed in a customer subscription. Availability is calculated over a monthly billing cycle.
Download Multi-Factor Authentication SLA