Microsoft AB-900 - Microsoft 365 Copilot and Agent Administration Fundamentals

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 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 .

The correct selections are No, Yes, Yes . Statement 1 is No because Microsoft states that if an organization has a Microsoft 365 Copilot license and at least one user is assigned to a Copilot license, SharePoint administrators automatically get access to the SharePoint Advanced Management features required for Copilot deployment. Microsoft does not say that all users in the organization must have Microsoft 365 Copilot licenses for administrators to use SharePoint Advanced Management.

Statement 2 is Yes because Microsoft documents SharePoint Advanced Management features such as Restricted Content Discovery and Restricted SharePoint Search , which can limit whether content from specific SharePoint sites appears in Microsoft 365 Copilot and organization-wide search experiences.

Statement 3 is Yes because Microsoft explicitly states that organizations can purchase a standalone SharePoint Advanced Management license for each user in the organization. That means it is available even for organizations that do not have Microsoft 365 Copilot.

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 answer is Microsoft SharePoint sites . Microsoft Learn documents that Microsoft Purview sensitivity labels for containers can be applied to Microsoft Teams, Microsoft 365 groups, and SharePoint sites . These labels can control settings such as privacy, external sharing, and unmanaged device access for the labeled site. That is the official Microsoft feature that matches the sentence in the question.

The other options are not the best match for this item. Microsoft 365 Copilot conversations are not the standard object to which admins directly apply a sensitivity label in the way this question is asking. Copilot can honor labels on source content and may display label context in responses, but the selectable resource here is not “Copilot conversations.” Azure Blob Storage is also not the intended answer in the Microsoft 365 Copilot and Agent Admin context for Purview sensitivity labels.

So for this hotspot, the sentence is correctly completed with Microsoft SharePoint sites , because Microsoft explicitly supports applying Purview sensitivity labels to SharePoint sites as a container-level labeling capability.

The correct answers are A and D because both tasks are supported directly in the Exchange admin center (EAC) . Microsoft Learn states that administrators can manage mail flow rules in Exchange Online from the EAC under Mail flow > Rules , which includes creating and managing transport rules for organizational email handling. Microsoft Learn also states that administrators can create shared mailboxes in the EAC under Recipients > Mailboxes , where a shared mailbox can be added and then delegated to users.

Option B is incorrect because adding a custom domain is normally done in the Microsoft 365 admin center , specifically on the Domains page. Although Exchange can later work with accepted domains and related mail flow settings, the act of adding and verifying a custom domain is not an Exchange admin center task. Option C is incorrect because license assignment is handled through Microsoft 365 or Microsoft Entra administrative tools, not the Exchange admin center.

You can use a Microsoft Entra security group to assign permissions to Microsoft Entra ID resources. Answer: Yes

You can use a Microsoft Entra security group to assign Microsoft 365 licenses. Answer: Yes

You can use a Microsoft Entra security group to assign permissions to Microsoft Exchange mailboxes. Answer: No

Communications Compliance uses OCR (optical character recognition) and machine learning to detect offensive or risky text inside images , including those in SharePoint and OneDrive.

By default, Communications Compliance pseudonymizes user identities to reduce investigator bias. Admins can later deanonymize if needed.

It does not add disclaimers. It silently monitors communications and flags policy violations; disclaimers are handled by Exchange transport rules, not Communications Compliance.

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 .