Definition
Azure Active Directory, now known as Microsoft Entra ID, is a cloud-based identity and access management service. It allows organizations to manage user access to applications, data, and resources securely. Entra ID enables single sign-on, multi-factor authentication, and conditional access policies to protect corporate assets. This service is crucial for ensuring that only authorized individuals can access sensitive information and systems, thereby reducing the risk of data breaches. For instance, an employee can use their single Entra ID login to access both their company email and a cloud-based project management tool. It is important to distinguish Entra ID from on-premises Active Directory, which is a local network directory service. You will encounter Entra ID concepts on exams like CompTIA Security+, CISSP, and CCSP.