AB-900 Microsoft 365 Copilot and Agent Administration Fundamentals Free Practice Exam Questions (2026 Updated)

The correct answer is C. Microsoft Defender for Endpoint . Microsoft documents that Defender for Endpoint is the Microsoft security solution for endpoint devices , including Windows 11 , and that it lets security teams investigate incidents, alerts, affected devices, files, processes, and remediation actions in the Microsoft Defender portal. Microsoft’s investigation guidance specifically describes using Defender for Endpoint to review alerts and investigate affected devices from the devices list, alerts queue, and incident views.

The other options do not match this requirement. Microsoft Entra ID Protection is for risky users and risky sign-ins, not device incident investigation. Microsoft Purview Insider Risk Management focuses on risky user behavior such as data theft or exfiltration, not endpoint security alerts from Windows devices. Microsoft Defender for Identity monitors on-premises and hybrid identity signals from Active Directory environments, not Windows 11 endpoint incidents. For security incidents and alerts raised from organization-managed Windows 11 devices, Microsoft’s documented solution is Microsoft Defender for Endpoint .

The correct selections are Yes, Yes, Yes . For statement 1, Microsoft Support explains that if you are not a site owner, you might still be able to invite other people to the site , although the invitation can generate an access request that a site owner approves or declines. Microsoft also states that site users have the opportunity to invite other people to collaborate on sites , unless that feature is disabled. That makes the statement true.

For statement 2, Microsoft Learn states that in SharePoint you can give people permissions to a site by adding individual users, security groups, or Microsoft 365 groups to one of the three SharePoint groups, including the Members group. That directly supports the statement.

For statement 3, Microsoft documents that site ownership and membership can be managed by adding or removing owners, members, site owners, site members, and site visitors . For group-connected sites, Microsoft also documents that owners can manage group ownership and remove owner status. Therefore, a site owner can remove another site owner, provided at least one owner remains.

The correct answer is D. Data Lifecycle Management . Microsoft Learn states that Microsoft Purview retention policies and retention labels, managed under Data Lifecycle Management , support three core outcomes: retain-only , delete-only , and retain and then delete . The requirement in this question is exact: keep email for seven years and then permanently delete it. That is a textbook retain and then delete retention configuration, which Microsoft documents as part of Purview’s retention capabilities. Microsoft also recommends using Microsoft 365 retention policies and labels for retaining and deleting emails rather than relying on older Exchange-only approaches in most modern compliance scenarios.

The other options do not meet the requirement. Information Protection focuses on labeling and protecting sensitive information. Insider Risk Management is used to detect and investigate risky user behavior. Data Loss Prevention helps prevent inappropriate sharing or exfiltration of sensitive data. None of those are designed to enforce a timed seven-year retention period followed by automatic permanent deletion. The Microsoft Purview solution explicitly built for that lifecycle requirement is Data Lifecycle Management .

The correct answer is C. Microsoft Graph . Microsoft documents that Microsoft 365 Copilot combines large language models with content and context from the Microsoft Graph to generate grounded responses. Microsoft Graph provides access to organizational data and signals across Microsoft 365 services, including SharePoint , OneDrive , Exchange , Teams , calendars, chats, files, and other work content. When SharePoint data is relevant to the prompt and the user already has permission to access it, Copilot uses Microsoft Graph as the layer that retrieves and grounds that corporate data for the response.

The other options are incorrect for this question. Microsoft Intune is used for endpoint and device management. Microsoft Defender is used for threat protection and security operations. Microsoft Purview provides compliance, governance, data protection, and risk management capabilities. While Copilot honors Purview protections and Microsoft 365 permissions, the specific service it uses to access and ground responses in SharePoint-based corporate data is Microsoft Graph . Therefore, the correct answer is Microsoft Graph .

The correct answers are C and D . Microsoft Learn explains that agents created with Agent Builder in Microsoft 365 Copilot allow you to define specific instructions that extend Microsoft 365 Copilot for a business scenario. Microsoft also documents that you can add knowledge sources such as specific public websites and SharePoint content so the agent can reason over targeted information instead of relying only on the default chat experience. Those two capabilities directly match the needs in options C and D.

Option A is incorrect because grouping chats is a Copilot notebook scenario, not the reason to build an agent. Option B is incorrect in the context of creating an agent in the Microsoft 365 Copilot app . Agent Builder supports declarative agents with instructions, knowledge, and capabilities, but Microsoft Learn describes custom AI model control as part of custom engine agents built with tools such as Copilot Studio, SDKs, or Foundry, not as a standard Agent Builder feature in the Microsoft 365 Copilot app. Therefore, when the task is specifically to create an agent in the app, the valid reasons are custom instructions and reasoning over a specific website .

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.

The correct answer is A. the Microsoft Defender portal . Microsoft documents that phishing investigation and analysis for email threats is handled in Microsoft Defender for Office 365 through the Microsoft Defender portal . Microsoft’s phishing investigation guidance and email security reporting both point admins to Defender capabilities such as Threat Explorer , campaign views , and phish reports to understand the scope, affected users, and impact of phishing attacks.

The other options are not the primary investigation tool for this scenario. The Microsoft 365 admin center is mainly for tenant administration and usage reporting, not detailed phishing impact investigation. The Microsoft Entra admin center focuses on identity and access management, not email threat analysis. The Exchange admin center manages mail flow and Exchange settings, but Microsoft’s current phishing investigation workflows are centered in the Microsoft Defender portal , where security analysts can review detections, remediation actions, and affected recipients.

So, to review the impact of a phishing incident that targeted email users, the Microsoft-documented choice is the Microsoft Defender portal .

The correct answers are A and D . Microsoft documents that with group-based licensing , licenses assigned to a group are automatically inherited by the group’s members. Therefore, if User1 is added to Group1 , User1 can receive the Microsoft 365 E3 license through group membership. Microsoft also documents that licenses can be assigned directly to individual users , so assigning a Microsoft 365 E3 license straight to User1 is also a complete solution.

Options B and C are incorrect because Conditional Access controls how users access cloud resources after sign-in; it does not grant product entitlements or service licenses. Microsoft licensing guidance separates access-policy controls from actual license assignment. In this scenario, the issue is lack of license entitlement, not access conditions. As a result, the valid solutions are either to make User1 a member of the licensed group or to assign the license directly to User1. Microsoft also notes that group-based licensing assignment can fail if required user properties such as usage location are missing, but among the available answer choices, the two complete license-granting actions are Add User1 to Group1 and Assign a license to User1 .

In Microsoft 365 Copilot, you should use the Researcher agent to perform multi-step reasoning over unstructured data.

The correct answer is the Researcher agent . Microsoft describes Researcher in Microsoft 365 Copilot as an agent for complex, multi-step research that can reason across information sources and synthesize findings into structured outputs. That aligns with the phrase multi-step reasoning in the question. Microsoft’s guidance also contrasts Researcher with Analyst , which is aimed more at data analysis and spreadsheet-oriented tasks.

The other options are less suitable. Chat is general-purpose and not the specialized tool Microsoft positions for deeper multi-step research workflows. A notebook is used to organize materials and chats, not as the main reasoning engine for this scenario. The Analyst agent is better suited to structured data analysis, trends, and calculations rather than broad reasoning over unstructured data such as documents, notes, and mixed content. Based on Microsoft’s product positioning, the best fit for multi-step reasoning over unstructured information is the Researcher agent .

the Microsoft Authenticator app

The correct answer is the Microsoft Authenticator app . The image shows the familiar Microsoft MFA prompt that says “Are you trying to sign in?” and “Enter the number shown to sign in.” Microsoft documents this as number matching in Authenticator push notifications , which is part of Microsoft Entra multifactor authentication using the Microsoft Authenticator app . Microsoft explains that number matching is a security improvement for Authenticator push approvals and is used when the default sign-in method is Authenticator push notifications.

The other choices do not match the experience shown. Email OTP would involve a one-time code sent by email. SMS would send a text message code to a phone number. Temporary Access Pass is a time-limited passcode used for onboarding or recovery scenarios, not the mobile push screen shown in the image. Because the graphic specifically shows a mobile approval prompt with number matching, the MFA method is clearly the Microsoft Authenticator app .

time-bound role activation

The correct answer is time-bound role activation . Microsoft Learn explains that Microsoft Entra Privileged Identity Management (PIM) allows users to be made eligible for privileged roles and then activate those roles only when needed. Microsoft also states that once activated, the role is active for a preconfigured period of time , after which the privileged access expires automatically. This is the core just-in-time and time-limited access model that PIM is designed to provide. ( learn.microsoft.com )

The other options do not match Microsoft’s definition of PIM. It is not primarily described as providing restricted access to Microsoft 365 services , the lifecycle management of users , or the management of enterprise applications . Those areas relate more closely to other Microsoft Entra and Microsoft 365 governance capabilities. Microsoft specifically positions PIM as a service to manage, control, and monitor access to important resources by using eligible assignments , approval workflows , MFA if required , and temporary role activation . Therefore, the phrase that correctly completes the sentence is time-bound role activation . ( learn.microsoft.com )

The correct answer is Data access governance . Microsoft documents that Data access governance reports in the SharePoint admin center help administrators discover overshared or sensitive SharePoint content and assess sharing exposure. More specifically, Microsoft’s sharing links activity reports under Data access governance are designed to monitor sharing activity and identify sites where links such as Anyone , People in the organization , and Specific people links have been created. This is the SharePoint admin reporting area Microsoft provides for investigating external sharing patterns and related exposure.

The other listed reports do not fit this requirement. Agent insights is for Copilot/agent usage, App insights is for application-related insights, Change history tracks configuration changes, OneDrive accounts focuses on OneDrive administration, and Site policy comparison compares site settings. None of those is the SharePoint report family intended for identifying externally shared SharePoint content. Based on Microsoft’s documentation, the report area you should use is Data access governance .

The correct selections are No, Yes, Yes . Statement 1 is No because Microsoft documents that Agent Builder in Microsoft 365 Copilot is included with the Microsoft 365 Copilot license , and agents built with that feature are part of that licensed experience. Microsoft also states that the capability is enabled by default in Microsoft 365 Copilot licensed tenants . While Copilot Chat users with qualifying Microsoft 365 licenses can access web-grounded chat experiences, creating Microsoft 365 Copilot agents in the app is documented under the Copilot-licensed Agent Builder experience, not as an E5-only entitlement.

Statement 2 is Yes because Microsoft states that Researcher and Analyst were deployed to users with Microsoft 365 Copilot licenses . Statement 3 is Yes because Microsoft says users can build agents in Agent Builder by using natural language or manually .

The correct answer is Require multifactor authentication for administrative roles . In the exhibit, each recommendation shows its available Secure Score points . The listed values are 1/1 for Use least privileged administrative roles , 8/8 for Do not expire passwords , 0.73/8 for Enable policy to block legacy authentication , and 0/10 for Require multifactor authentication for administrative roles . Because 10 points is the highest value among the options shown, resolving that recommendation would improve the Identity Secure Score the most.

Microsoft Learn explains that Identity Secure Score in Microsoft Entra is based on Microsoft security recommendations, and each recommendation contributes a specific number of points depending on its impact and implementation state. Recommendations related to administrator protection are especially important because privileged accounts are high-value attack targets. Microsoft also emphasizes multifactor authentication for admin roles as a core identity security best practice. Therefore, both from the screenshot and from Microsoft’s identity guidance, the recommendation with the greatest score improvement is Require multifactor authentication for administrative roles .

The correct answer is View all the users in the Microsoft Entra tenant . In the exhibit, John is assigned the Global Reader role. Microsoft documents that the Global Reader role is intended for users who need to view administrator features and settings in admin centers that a Global Administrator can view, but without edit permissions. That makes it appropriate for read-only visibility into tenant-wide directory and admin information, including users in Microsoft Entra.

The other answer choices are not supported by the Global Reader role. Microsoft distinguishes admin-center visibility from access to content in workloads such as SharePoint sites and Exchange mailboxes . Global Reader is a read-only administrative role, not a content access role for reading all documents or mailbox items. Likewise, performing eDiscovery of Microsoft 365 Copilot prompts requires Purview eDiscovery permissions or role group membership, not merely the Global Reader role. Microsoft documents eDiscovery permissions separately in Purview role groups.

Therefore, based on the assigned role shown, the valid completion is that John can view all the users in the Microsoft Entra tenant .

provide control over how users can access cloud apps.

The correct answer is provide control over how users can access cloud apps . Microsoft Learn defines Microsoft Entra Conditional Access as the Zero Trust policy engine that uses if-then logic to make access decisions. Microsoft states that Conditional Access policies determine who can access resources, what resources they can access, and under what conditions . These policies can require actions such as multifactor authentication, compliant devices, or other controls before allowing access to applications and services like Microsoft 365. That means Conditional Access is specifically used to control how users access cloud apps .

The other options are incorrect. Conditional Access policies are not configured by using the Microsoft Defender portal ; they are managed in the Microsoft Entra admin center . They are also not applied only to on-premises resources , because Microsoft documents Conditional Access primarily for cloud identities, cloud apps, and cloud-connected resources. Finally, Conditional Access does not require a Microsoft Exchange mailbox. It can be applied broadly across many Microsoft and third-party cloud applications integrated with Microsoft Entra.

The correct answers are A and D because Microsoft Entra Identity Secure Score is based on identity security recommendations, and Microsoft Learn specifically lists recommendations such as “Designate more than one Global Administrator” and “Do not expire passwords.” That means the number of global administrators in the tenant and whether password expiration is disabled directly influence the Identity Secure Score. Microsoft also notes that the score measures how closely an organization aligns with Microsoft’s recommended identity security best practices.

Option B is incorrect because SharePoint site permissions are related to SharePoint and Microsoft 365 workload permissions, not to the Entra identity-focused scoring model. Option C is incorrect because user location may be evaluated in Conditional Access and Zero Trust scenarios, but it is not itself listed as a direct Identity Secure Score factor in the Microsoft Entra recommendations referenced by Microsoft Learn. Identity Secure Score is driven by tracked identity recommendations and security configurations, not by simple geographic placement of users.

The correct selections are Information Protection and Data Loss Prevention . Microsoft documents that Microsoft Purview Information Protection helps organizations discover, classify, protect, and govern sensitive information wherever it lives or travels . Microsoft also describes Information Protection as the Purview solution for data classification, sensitivity labels, and encryption , including scenarios across Microsoft 365, on-premises repositories, cloud stores, and even third-party apps through supported extensions. That makes it the correct choice for the requirement to discover and classify sensitive data across multiple platforms .

For the second requirement, Microsoft states that Microsoft Purview Data Loss Prevention (DLP) helps prevent the unintentional sharing of sensitive items and can block users from prohibited activities , including inappropriate external sharing through services such as SharePoint, OneDrive, Teams, and email. Microsoft specifically documents DLP scenarios for preventing sensitive items from being shared with external users , which matches the requirement to block users from sharing intellectual property externally.

The correct selections are No, No, Yes . Microsoft states that for Microsoft 365 Copilot , customer prompts, responses, and Microsoft Graph grounding data aren’t used to train foundation models . Microsoft also explains that Copilot processes organizational data within the service boundary and applies the same commitments that protect Microsoft 365 customer data. That makes statements 1 and 2 No . Microsoft further documents that Microsoft 365 Copilot grounds responses using Microsoft Graph and only surfaces data that the user is permitted to access , so it respects existing identity, access, and permission controls in the tenant. That makes statement 3 Yes .

This behavior is a core part of Copilot’s enterprise design. Microsoft describes Copilot as inheriting your organization’s existing Microsoft 365 permissions model, including access controls on content in SharePoint, OneDrive, Exchange, Teams, and other Microsoft 365 services. So Copilot does not grant new access; it works within the permissions already assigned to the signed-in user.