Safe Attachments for SharePoint, OneDrive, and Microsoft Teams
In organizations with Microsoft Defender for Office 365, Safe Attachments for SharePoint, OneDrive, and Microsoft Teams provides an additional layer of protection against malware. After files are asynchronously scanned by the common virus detection engine in Microsoft 365, Safe Attachments opens files in a virtual environment to see what happens (a process known as detonation). Safe Attachments for SharePoint, OneDrive, and Microsoft Teams also helps detect and block existing files that are identified as malicious in team sites and document libraries.
Reference:
https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/safe-attachments-for-spo-odfb- teams-about

References:
https://docs.microsoft.com/en-us/azure-advanced-threat-protection/atp-capacity-planning However, if the case study had required that the DCs can ' t have any s/w installed, then the answer would have been a standalone sensor on Server2. In this scenario, the given answer is correct. BTW, ATP now known as Defender for Identity.
Topic 2, A. DatumCase Study:
Overview
Existing Environment
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Current Infrastructure
A). Datum recently purchased a Microsoft 365 subscription.
All user files are migrated to Microsoft 365.
All mailboxes are hosted in Microsoft 365. The users in each office have email suffixes that include the country of the user, for example, [email protected] or user2#uk.ad3tum.com.
Each office has a security information and event management (SIEM) appliance. The appliances come from three different vendors.
A). Datum uses and processes Personally Identifiable Information (PII).
Problem Statements
Requirements
A). Datum entered into litigation. The legal department must place a hold on all the documents of a user named User1 that are in Microsoft 365.
Business Goals
A). Datum warns to be fully compliant with all the relevant data privacy laws in the regions where it operates.
A). Datum wants to minimize the cost of hardware and software whenever possible.
Technical Requirements
A). Datum identifies the following technical requirements:
Centrally perform log analysis for all offices.
Aggregate all data from the SIEM appliances to a central cloud repository for later analysis.
Ensure that a SharePoint administrator can identify who accessed a specific file stored in a document library.
Provide the users in the finance department with access to Service assurance information in Microsoft Office
365.
Ensure that documents and email messages containing the PII data of European Union (EU) citizens are preserved for 10 years.
If a user attempts to download 1,000 or more files from Microsoft SharePoint Online within 30 minutes, notify a security administrator and suspend the user ' s user account.
A security administrator requires a report that shows which Microsoft 36S users signed in Based on the report, the security administrator will create a policy to require multi-factor authentication when a sign in is high risk.
Ensure that the users in the New York office can only send email messages that contain sensitive US. PII data to other New York office users. Email messages must be monitored to ensure compliance. Auditors in the New York office must have access to reports that show the sent and received email messages containing sensitive U.S. PII data.

Explanation: