Azure Active Directory (AAD) is the next evolution of identity and access management (IAM) solutions for the cloud. Microsoft introduced Active Directory (AD) Domain Services in Windows 2000 to give organizations the ability to manage multiple on-premises infrastructure components and systems.
Azure AD takes this approach to the next level by providing organizations with an Identity as a Service (IDaaS) solution for all their apps across cloud and on-premises.
Most IT administrators are familiar with Active Directory Domain Services concepts. The following table outlines the differences and similarities between Active Directory concepts and Azure Active Directory.
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