Quick Answer
The answer is to configure diagnostic settings for the Activity Log. This is correct because Azure’s default retention for the Activity Log is only 90 days, and the native mechanism to extend Azure Activity Log retention beyond default for long-term analysis is to route the data via diagnostic settings to a Log Analytics workspace for querying or to an Azure Storage account for archival. On the AZ-104 exam, this question tests your understanding that diagnostic settings are the sole configuration for controlling Activity Log retention, not the Activity Log blade itself—a common trap is assuming you can adjust retention directly on the log’s properties page. Remember, the Activity Log is a platform-level log, so you must send it elsewhere to keep it past 90 days. A helpful memory tip: “Diagnostics drive duration”—if you need data beyond the default, you must set up a diagnostic destination.
This AZ-104 practice question tests your understanding of monitor and maintain azure resources. 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 company must retain Azure Activity Log data beyond the built-in retention period and make it available for long-term analysis. Which configuration should you use?
Diagnostic settings for the Activity Log
Diagnostic settings export Activity Log data to supported long-term destinations.
A ReadOnly lock on the subscription
Why wrong: A lock does not change Activity Log retention.
An availability set
Why wrong: An availability set is unrelated to Activity Log storage.
NSG flow logs only
Why wrong: NSG flow logs capture network traffic information, not the Azure Activity Log.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Diagnostic settings for the Activity Log
Azure Activity Log is retained by default for 90 days. To store data beyond this period for long-term analysis, you must configure diagnostic settings to route the Activity Log to a Log Analytics workspace (for querying) or an Azure Storage account (for archival). This is the only native mechanism to extend retention and enable long-term analysis.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Diagnostic settings for the Activity Log
Why this is correct
Diagnostic settings export Activity Log data to supported long-term destinations.
Related concept
Read the scenario before looking for a memorised answer.
A ReadOnly lock on the subscription
Why it's wrong here
A lock does not change Activity Log retention.
An availability set
Why it's wrong here
An availability set is unrelated to Activity Log storage.
NSG flow logs only
Why it's wrong here
NSG flow logs capture network traffic information, not the Azure Activity Log.
Common exam traps
The trap here is that candidates confuse the built-in 90-day retention of the Activity Log with the ability to extend it, mistakenly thinking a lock or other resource configuration can preserve the data, when only diagnostic settings provide the export and retention control needed.
Detailed technical explanation
Under the hood, diagnostic settings for the Activity Log use Azure Monitor's data collection pipeline to stream the log to a destination of your choice. When sent to a Log Analytics workspace, you can query the data with KQL for up to two years (or more with workspace retention settings), while storage accounts allow indefinite archival with lifecycle management policies. A common real-world scenario is compliance auditing, where you must retain Activity Log data for years to meet regulatory requirements like SOC 2 or GDPR.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
Monitor and Maintain Azure Resources — This question tests Monitor and Maintain Azure Resources — Read the scenario before looking for a memorised answer..
The correct answer is: Diagnostic settings for the Activity Log — Azure Activity Log is retained by default for 90 days. To store data beyond this period for long-term analysis, you must configure diagnostic settings to route the Activity Log to a Log Analytics workspace (for querying) or an Azure Storage account (for archival). This is the only native mechanism to extend retention and enable long-term analysis.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Same concept, more angles
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. Your company must retain Azure Activity Log data beyond the default retention period and make it available for long-term analysis. What should you configure?
hardWhy A: Diagnostic settings for the Activity Log allow you to stream the log to a Log Analytics workspace, storage account, or Event Hubs, thereby extending retention beyond the default 90 days (for storage) or indefinitely (in Log Analytics). This is the only mechanism that enables long-term retention and analysis of Azure Activity Log data.
Variation 2. Your company needs to retain Azure Activity Log data longer than the built-in retention period and make it available for future analysis. What should you configure?
hardWhy A: Azure Activity Log has a default retention period of 30 days for Standard tier subscriptions and 90 days for others. To retain data longer, you must configure diagnostic settings to stream the Activity Log to a Log Analytics workspace (for long-term querying) or to an Azure Storage account (for archival). Diagnostic settings allow you to define the retention duration beyond the built-in limit, enabling future analysis.
Variation 3. You need to keep Azure activity log data for longer than the default retention period and make it available for analysis. What should you configure?
hardWhy A: The default retention period for Azure activity logs is 90 days. To retain activity log data beyond this period and make it available for analysis (e.g., in a Log Analytics workspace, storage account, or Event Hubs), you must configure diagnostic settings for the activity log. This allows you to stream the log data to a destination of your choice, where you can set custom retention policies.
Last reviewed: Jun 11, 2026
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