The answer is the EmailAttachmentInfo table. This is the correct choice because it is the dedicated advanced hunting table in Microsoft 365 that records every attachment on email messages, including its SHA256 hash, file name, and the associated NetworkMessageId. When a security analyst needs to find emails with a specific attachment hash, querying EmailAttachmentInfo with that known SHA256 value directly returns the network message IDs of all delivered messages containing that exact malicious file, enabling a full impact assessment. On the SC-200 exam, this question tests your ability to map a specific investigative need to the correct hunting schema, and a common trap is confusing EmailAttachmentInfo with EmailEvents (which logs delivery actions but not attachment hashes) or EmailUrlInfo (which tracks links). A reliable memory tip is to think "Attachment Hash = Attachment Info," so when you need to locate emails by file hash, always start with the table that has "Attachment" in its name.
SC-200 Mitigate threats using Microsoft Defender XDR Practice Question
This SC-200 practice question tests your understanding of mitigate threats using microsoft defender xdr. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security analyst is investigating a potential phishing campaign and has identified a malicious attachment with a known SHA256 hash. The analyst needs to find all email messages that were delivered to users and contained this exact attachment. Which advanced hunting table should the analyst query to obtain the network message IDs of the relevant emails?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
EmailAttachmentInfo
The EmailAttachmentInfo table in Microsoft 365 Advanced Hunting contains records of every attachment in email messages, including the SHA256 hash. By querying this table with the known hash, the analyst can retrieve the NetworkMessageId values for all emails that contained that specific malicious attachment, enabling further investigation into delivery and impact.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
EmailEvents
Why it's wrong here
EmailEvents contains email metadata (subject, sender, etc.) but does not include attachment hashes.
✓
EmailAttachmentInfo
Why this is correct
EmailAttachmentInfo includes the SHA256 hash of each attachment and the NetworkMessageId of the email.
Related concept
Read the scenario before looking for a memorised answer.
✗
EmailUrlInfo
Why it's wrong here
EmailUrlInfo is used for URLs in emails, not file attachments.
✗
EmailPostDeliveryEvents
Why it's wrong here
EmailPostDeliveryEvents contains actions taken after delivery (e.g., user click), not attachment details.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse EmailEvents (which has delivery status) with EmailAttachmentInfo (which has attachment hashes), failing to recognize that only the latter contains the SHA256 hash needed to match a known malicious file.
Detailed technical explanation
How to think about this question
The EmailAttachmentInfo table is populated by Microsoft Defender for Office 365 during email processing, capturing each attachment's SHA256 hash, file name, and file size. This allows security teams to correlate a known malicious hash across all tenants and identify every email that carried it, even if the attachment was renamed. In a real-world scenario, an analyst might join EmailAttachmentInfo with EmailEvents on NetworkMessageId to trace the full delivery path and recipient actions.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-200 question in full detail.
Mitigate threats using Microsoft Defender XDR — This question tests Mitigate threats using Microsoft Defender XDR — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: EmailAttachmentInfo — The EmailAttachmentInfo table in Microsoft 365 Advanced Hunting contains records of every attachment in email messages, including the SHA256 hash. By querying this table with the known hash, the analyst can retrieve the NetworkMessageId values for all emails that contained that specific malicious attachment, enabling further investigation into delivery and impact.
What should I do if I get this SC-200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A security analyst is investigating a phishing campaign targeting multiple users. The analyst has identified a malicious attachment with a known SHA256 hash. The analyst needs to find all email messages that were delivered to any user and contained this specific attachment. Which advanced hunting table should the analyst query in Microsoft 365 Defender to obtain the message IDs of emails containing the attachment?
medium
A.EmailEvents
✓ B.EmailAttachmentInfo
C.EmailPostDeliveryEvents
D.DeviceFileEvents
Why B: The EmailAttachmentInfo table in Microsoft 365 Defender advanced hunting contains metadata about attachments on email messages, including the SHA256 hash of each attachment. By querying this table with the known malicious SHA256 hash, the analyst can retrieve the NetworkMessageId values for all emails that contained that specific attachment, regardless of whether the email was delivered or blocked.
Last reviewed: Jun 11, 2026
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This SC-200 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-200 exam.
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