The answer is the EmailUrlInfo table. This is the correct first query because EmailUrlInfo is specifically designed to store URL-to-email mappings in Microsoft Defender XDR, containing each extracted URL along with its associated NetworkMessageId. By querying for the known malicious URL, you retrieve the unique email identifiers, which you then join with the EmailEvents table to pinpoint the exact recipients. On the SC-200 exam, this tests your understanding of advanced hunting schema relationships and the logical order of investigation—a common trap is jumping straight to EmailEvents or EmailAttachmentInfo, which lack the direct URL-to-message link. Remember the workflow: URL first in EmailUrlInfo, then recipients in EmailEvents. A useful memory tip is “URL to ID, then ID to user”—think of EmailUrlInfo as the bridge that connects a malicious link to the inboxes it reached.
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 wants to identify all users who received a phishing email that contained a known malicious URL. The analyst has the URL. Which advanced hunting table should the analyst query first to find the emails that contained this URL?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Why wrong: EmailEvents contains email metadata but does not include the URLs present in the email body or attachments.
B
EmailUrlInfo
EmailUrlInfo stores each URL found in an email along with the NetworkMessageId. Querying this table filtered by the malicious URL will return the network message IDs of the emails containing it.
C
EmailAttachmentInfo
Why wrong: This table contains information about attachments, not URLs.
D
EmailPostDeliveryEvents
Why wrong: This table records actions taken on emails after delivery (e.g., moved to junk), not the original email content.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
EmailUrlInfo
The EmailUrlInfo table in Microsoft Defender XDR contains records of URLs extracted from email messages, including the specific URL and the email's unique identifier (NetworkMessageId). By querying this table for the known malicious URL, the analyst can retrieve the NetworkMessageIds of all emails containing that URL, which can then be joined with the EmailEvents table to identify the recipients. This is the most direct and efficient first step because EmailUrlInfo is purpose-built to map URLs to email messages.
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 but does not include the URLs present in the email body or attachments.
✓
EmailUrlInfo
Why this is correct
EmailUrlInfo stores each URL found in an email along with the NetworkMessageId. Querying this table filtered by the malicious URL will return the network message IDs of the emails containing it.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
EmailAttachmentInfo
Why it's wrong here
This table contains information about attachments, not URLs.
✗
EmailPostDeliveryEvents
Why it's wrong here
This table records actions taken on emails after delivery (e.g., moved to junk), not the original email content.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often jump to EmailEvents thinking it contains all email details, but they forget that URL content is stored in a separate table (EmailUrlInfo) and must be queried first to identify the specific emails.
Detailed technical explanation
How to think about this question
Under the hood, the EmailUrlInfo table is populated by the URL detection engine that parses email bodies and extracts all hyperlinks, storing them with the email's NetworkMessageId and a unique UrlId. This allows cross-referencing with the UrlClickEvents table to detect user clicks on malicious URLs. In a real-world scenario, an analyst would first query EmailUrlInfo for the malicious URL, then join the results with EmailEvents on NetworkMessageId to get recipient details, and optionally join with IdentityInfo to map recipients to user accounts.
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: EmailUrlInfo — The EmailUrlInfo table in Microsoft Defender XDR contains records of URLs extracted from email messages, including the specific URL and the email's unique identifier (NetworkMessageId). By querying this table for the known malicious URL, the analyst can retrieve the NetworkMessageIds of all emails containing that URL, which can then be joined with the EmailEvents table to identify the recipients. This is the most direct and efficient first step because EmailUrlInfo is purpose-built to map URLs to email messages.
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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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