Microsoft 365 Copilot and Agent Administration Fundamentals (beta) AB-900 Exam Questions
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Your organization has a Microsoft 365 subscription that uses Microsoft Entra ID. You have a custom web app named App1.
Users automatically authenticate to App1 by using their Microsoft Entra credentials, without manually entering their credentials.
What is this an example of?
Correct Answer: D
The correct answer is D. single sign-on (SSO). Microsoft Entra single sign-on lets users sign in once with one set of credentials and then access assigned applications without signing in again. In this scenario, users authenticate to App1 automatically by using Microsoft Entra credentials, so the app is relying on the tenant identity provider rather than requiring separate app credentials. Multifactor authentication is an additional verification step, not the automatic reuse of an authenticated session. Password synchronization synchronizes password hashes between identity stores, and pass-through authentication validates credentials against on-premises Active Directory. Neither describes the user experience shown here. The key wording is “without manually entering their credentials,” which maps directly to SSO.
You are reviewing your company ' s security policies as part of a Zero Trust strategy. Which statement accurately describes the Zero Trust principles?
Correct Answer: A
The correct answer is A . Microsoft Learn defines Zero Trust as a security strategy built on the principles verify explicitly , use least privilege access , and assume breach . Microsoft also summarizes Zero Trust as a model that assumes breach and verifies every request , rather than trusting users, devices, or traffic simply because they originate from inside the corporate network. This is the key reason option A is correct. Under Zero Trust, every access request should be evaluated continuously using available signals such as identity, device state, location, service, and risk.
Option B is incorrect because improving user experience is not the defining principle of Zero Trust. Option C is incorrect because Zero Trust requires ongoing review and adjustment of permissions, especially through least privilege and risk-based access. Option D is incorrect because Zero Trust explicitly rejects implicit trust based on network location. Microsoft states that organizations should reduce reliance on the traditional idea that anything on the internal network is automatically safe or trustworthy.
Your organization has a Microsoft 365 subscription.
All users have Microsoft 365 Copilot licenses.
You need to identify where sensitive content is being used during Copilot interactions, analyze the content usage patterns, and provide recommendations on applying the appropriate protections.
What should you use?
Correct Answer: B
The correct answer is B. the Microsoft Purview DSPM for AI solution . Microsoft documents that Data Security Posture Management for AI (DSPM for AI) in Microsoft Purview provides a central place to secure data for AI apps and proactively monitor AI use , including Copilots and agents . Microsoft also states that DSPM for AI helps organizations identify where sensitive content is used in AI interactions , review Copilot prompts and responses , analyze usage patterns , assess exposure and oversharing risks, and get recommendations for protections such as sensitivity labels and DLP policy coverage.
The other options do not fit this requirement. Microsoft Viva Insights focuses on productivity and work-pattern analytics, not sensitive-data protection in Copilot interactions. Microsoft Security Copilot is a security assistant for analysts, not the Purview governance solution that analyzes sensitive content use in Copilot and recommends data protections. Insider Risk Management is for identifying risky user behavior, not for broad AI interaction posture analysis and protection recommendations. Microsoft specifically positions DSPM for AI as the “front door” for discovering, monitoring, and protecting AI-related data usage in Microsoft 365 Copilot.