Information is missing on the availability guarantee for the Free version of Azure Active Directory (AAD). The provided contexts discuss the service level agreements (SLAs) for the paid tiers of Azure Active Directory, specifically the 99.9% uptime guarantee for Azure Active Directory Premium 1 and 2, and the upcoming 99.99% uptime guarantee for Azure AD user authentication starting on April 1, 2021. However, there is no information provided about the SLA for the Free version of AAD [1] [2] [3] [4] [6].