Microsoft AB-900 Exam - Topic 2 Question 15 Discussion

The correct answer is B. the Microsoft Entra admin center. Microsoft Entra ID manages authentication and identity services for Microsoft 365. Administrators can investigate failed sign-in attempts by navigating to Entra ID > Monitoring & health > Sign-in logs in the Microsoft Entra admin center. These logs contain authentication details, including usernames, applications, timestamps, IP addresses, authentication results, error codes, and Conditional Access evaluations. Administrators can filter events by Failure status to identify affected users and diagnose authentication problems. Microsoft Defender focuses on threat detection and security investigations. Microsoft Purview provides compliance, information protection, and data governance capabilities. The Microsoft 365 admin center supports general tenant administration but is not the primary interface for detailed authentication logs.