Microsoft Purview Audit Solutions provide organizations with comprehensive tools to search for and investigate activities across their Microsoft 365 environment, helping them respond to security incidents, forensic investigations, internal compliance requirements, and legal obligations.
There are …Microsoft Purview Audit Solutions provide organizations with comprehensive tools to search for and investigate activities across their Microsoft 365 environment, helping them respond to security incidents, forensic investigations, internal compliance requirements, and legal obligations.
There are two main audit solutions:
**Audit (Standard):**
This is the default auditing capability available with Microsoft 365 subscriptions. It allows organizations to log and search for audited activities across Microsoft 365 services such as Exchange Online, SharePoint Online, OneDrive, Azure Active Directory, Microsoft Teams, and more. Key features include:
- Thousands of searchable audit events
- A default retention period of 90 days for audit logs
- The ability to export audit records to CSV files for further analysis
- Access through the Microsoft Purview compliance portal
**Audit (Premium):**
Building on the Standard capabilities, Audit Premium offers enhanced features for organizations with more advanced compliance and investigation needs. Key additions include:
- Longer retention of audit logs (up to one year by default, and up to 10 years with an add-on license)
- Access to crucial forensic events, such as MailItemsAccessed and Send events in Exchange Online, which help investigators determine the scope of a data breach
- Higher bandwidth access to the Office 365 Management Activity API for faster data retrieval
- Intelligent insights that help identify potential breaches and determine the scope of compromise
**How It Works:**
When a user or admin performs an audited activity, an audit record is generated and stored in the organization's audit log. Administrators can then search these logs using the compliance portal by filtering on activities, date ranges, users, and specific files or sites.
Audit Solutions in Microsoft Purview are essential for maintaining organizational transparency, ensuring regulatory compliance, supporting incident response efforts, and providing evidence for legal proceedings. They serve as a foundational element of any organization's security and compliance strategy within the Microsoft 365 ecosystem.
Audit Solutions in Microsoft Purview: A Complete Guide for SC-900
Why Are Audit Solutions in Microsoft Purview Important?
In today's complex digital environment, organizations must maintain visibility into what users and administrators are doing across their Microsoft 365 environment. Audit solutions in Microsoft Purview provide a centralized way to track and log activities, enabling organizations to respond to security incidents, meet regulatory compliance requirements, conduct forensic investigations, and detect potential insider threats. Without robust auditing, organizations would be blind to unauthorized access, data exfiltration, and policy violations.
For the SC-900 exam, understanding audit solutions is critical because it falls under the broader domain of Capabilities of Microsoft Compliance Solutions, which represents a significant portion of the exam.
What Are Audit Solutions in Microsoft Purview?
Microsoft Purview provides two primary audit solutions:
1. Audit (Standard) - Included with Microsoft 365 E3, E5, and other eligible licenses - Enabled by default for organizations - Provides the ability to log and search for audited activities across Microsoft 365 services - Audit logs are retained for 180 days by default - Covers thousands of events across Exchange Online, SharePoint Online, OneDrive, Azure Active Directory (Microsoft Entra ID), Microsoft Teams, and more - Users can search the audit log through the Microsoft Purview compliance portal
2. Audit (Premium) - Available with Microsoft 365 E5 or E5 Compliance add-on licenses - Builds on all capabilities of Audit (Standard) - Provides longer retention of audit logs — up to 1 year by default, and up to 10 years with an add-on license - Offers high-value, crucial events that help determine the scope of a compromise (e.g., MailItemsAccessed, Send events in Exchange Online) - Provides higher bandwidth access to the Office 365 Management Activity API for faster data retrieval - Supports custom retention policies for audit logs based on the service where the activity occurred, specific activities, or the user who performed the activity
How Do Audit Solutions Work?
Here is a step-by-step overview of how auditing works in Microsoft Purview:
Step 1: Activity Occurs A user or admin performs an activity in a Microsoft 365 service (e.g., accessing a mailbox, viewing a file in SharePoint, or modifying a Teams setting).
Step 2: Event is Logged The activity is captured and recorded as an audit record in the unified audit log. The record includes details such as: - The date and time of the activity - The user who performed the activity - The activity type - The item or object that was affected - The IP address of the user - Additional details specific to the service
Step 3: Searching the Audit Log Security and compliance administrators can search the unified audit log from the Microsoft Purview compliance portal (compliance.microsoft.com). Searches can be filtered by: - Date range - Activities - Users - Files, folders, or sites - Keywords
Step 4: Exporting and Analyzing Results Search results can be exported to a CSV file for further analysis. Organizations can also use the Office 365 Management Activity API to programmatically access audit data and integrate it with SIEM (Security Information and Event Management) tools like Microsoft Sentinel.
Key Differences Between Audit (Standard) and Audit (Premium)
Feature | Audit (Standard) | Audit (Premium) Log Retention | 180 days | 1 year default, up to 10 years High-Value Events | No | Yes (e.g., MailItemsAccessed) Custom Retention Policies | No | Yes API Bandwidth | Standard | Higher bandwidth License Required | E3 | E5 or E5 Compliance
Key Concepts to Remember
- Unified Audit Log: A single log that captures activities from multiple Microsoft 365 services in one place. - MailItemsAccessed: A high-value event available only in Audit (Premium) that records when mail items are accessed by mail protocols and mail clients. This is critical for forensic investigations to determine if a mailbox was compromised. - Audit log search requires appropriate permissions: Users must be assigned the View-Only Audit Logs or Audit Logs role in Exchange Online to search the audit log. - Audit logging is turned on by default for Microsoft 365 and Office 365 enterprise organizations. - 10-year retention requires an additional add-on license on top of E5.
Exam Tips: Answering Questions on Audit Solutions in Microsoft Purview
Tip 1: Know the Licensing Differences The exam frequently tests your understanding of which features belong to Audit (Standard) versus Audit (Premium). Remember: longer retention, high-value events, custom retention policies, and higher API bandwidth are all Premium features.
Tip 2: Understand Key Scenarios If a question describes a scenario where an organization needs to investigate whether a compromised account accessed sensitive emails, the answer will likely involve Audit (Premium) and the MailItemsAccessed event.
Tip 3: Remember Default Retention Periods A common exam question involves retention periods. Standard = 180 days. Premium = 1 year default, up to 10 years with add-on.
Tip 4: Know Where Auditing is Accessed Audit solutions are accessed through the Microsoft Purview compliance portal (compliance.microsoft.com). If the exam gives you multiple portal options, choose this one.
Tip 5: Distinguish Audit from Other Compliance Tools Do not confuse Audit with eDiscovery (which is for finding and exporting content for legal cases) or Data Loss Prevention (which prevents data from leaving the organization). Audit is specifically about logging and searching for activities.
Tip 6: Understand the Unified Audit Log Concept The SC-900 exam may test whether you understand that auditing provides a single, unified log across multiple Microsoft 365 workloads, not separate logs for each service.
Tip 7: Watch for Trick Questions About Permissions If a question asks why a user cannot search the audit log, the answer is likely related to missing role assignments (View-Only Audit Logs or Audit Logs role).
Tip 8: Connect Audit to Broader Security Operations Understand that audit data can be sent to Microsoft Sentinel or other SIEM tools via the Management Activity API. Questions may ask about integrating audit data into a broader security monitoring strategy.
Summary
Audit solutions in Microsoft Purview are essential for organizational transparency, compliance, and security investigations. The SC-900 exam expects you to understand the purpose of auditing, the difference between Standard and Premium tiers, default retention periods, key high-value events, and how audit fits within the broader Microsoft compliance ecosystem. Focus on licensing requirements, feature differences, and practical investigation scenarios to confidently answer exam questions on this topic.
