- A
Set the rule frequency and threshold to trigger when the query returns more than 10 results.
Thresholds and frequencies are configured in the rule settings.
- B
Configure the rule action to generate an alert in Microsoft Defender XDR.
The alert is the primary output of the custom detection rule.
- C
Assign the rule to a severity level.
Why wrong: Severity is part of the alert configuration, but it is not a separate step; it's included when configuring the alert.
- D
Create a Power Automate flow to send an email when the rule triggers.
Why wrong: Email notification is not a required step; the rule can generate an alert directly.
- E
Save the advanced hunting query as a custom detection rule.
Custom detection rules are created from advanced hunting queries.
Question 1,572 of 1,639
Create a Custom Detection Rule in Microsoft Defender XDR with Threshold
This SC-200 practice question tests your understanding of manage a security operations environment. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your Microsoft Defender XDR environment has an advanced hunting query that returns devices potentially affected by a known vulnerability. You want to create a custom detection rule that triggers an alert when more than 10 devices are affected. Which THREE steps are required?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the rule frequency and threshold to trigger when the query returns more than 10 results.
Option A is correct because setting the rule frequency and threshold to trigger when the query returns more than 10 results directly implements the requirement to alert when more than 10 devices are affected. In Microsoft Defender XDR custom detection rules, the threshold condition is configured in the rule settings to evaluate the number of query results against a specified count, enabling precise alert triggering based on result volume.
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.
- ✓
Set the rule frequency and threshold to trigger when the query returns more than 10 results.
Why this is correct
Thresholds and frequencies are configured in the rule settings.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure the rule action to generate an alert in Microsoft Defender XDR.
Why this is correct
The alert is the primary output of the custom detection rule.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Assign the rule to a severity level.
Why it's wrong here
Severity is part of the alert configuration, but it is not a separate step; it's included when configuring the alert.
- ✗
Create a Power Automate flow to send an email when the rule triggers.
Why it's wrong here
Email notification is not a required step; the rule can generate an alert directly.
- ✓
Save the advanced hunting query as a custom detection rule.
Why this is correct
Custom detection rules are created from advanced hunting queries.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse optional post-alert actions (like Power Automate flows or severity assignment) with the mandatory steps required to create a functional custom detection rule, leading them to select options C or D instead of focusing on the core rule creation steps (save query, set frequency/threshold, configure alert action).
Detailed technical explanation
How to think about this question
Custom detection rules in Microsoft Defender XDR are built from advanced hunting queries and require three mandatory components: saving the query as a rule, defining the evaluation frequency and result threshold (e.g., 'Alert when number of results > 10'), and configuring the rule action to generate an alert. The threshold uses a numeric comparison against the query result count, and the frequency determines how often the query runs (e.g., every 1 hour). Under the hood, the rule engine runs the KQL query at the specified interval, compares the result count to the threshold, and if exceeded, creates an alert with the configured severity and action.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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FAQ
Questions learners often ask
What does this SC-200 question test?
Manage a security operations environment — This question tests Manage a security operations environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set the rule frequency and threshold to trigger when the query returns more than 10 results. — Option A is correct because setting the rule frequency and threshold to trigger when the query returns more than 10 results directly implements the requirement to alert when more than 10 devices are affected. In Microsoft Defender XDR custom detection rules, the threshold condition is configured in the rule settings to evaluate the number of query results against a specified count, enabling precise alert triggering based on result volume.
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.
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Last reviewed: Jul 4, 2026
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