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Office 365 and Microsoft 365 Security Audits

Safeguard Your Microsoft 365 Environment Today

Discover if your organization's Microsoft cloud environment is truly protected in today's complex digital landscape. With remote teams accessing sensitive data, the rise of personal devices, and an ever-evolving cyber threat landscape, security risks have multiplied. Our comprehensive security audit helps identify vulnerabilities across your Microsoft 365 environment before they become breaches, ensuring your business stays protected.

What is a Microsoft 365 Security Audit?

A Microsoft 365 security audit is a comprehensive review of your Office 365 and Microsoft 365 configurations. It ensures your environment is safeguarded from data breaches, cyberattacks, and insider threats—whether accidental or malicious.

Remember that Microsoft cloud services also rely on the Shared Responsibility Model:

  • Microsoft: Manages and secures the physical infrastructure and core services.
  • User (You): Responsible for securing access, identities, and the data stored in various apps and services.

Although Microsoft 365 meets stringent standards like ISO/IEC 27001, SOC 2/3, FedRAMP, GDPR, and HIPAA, organizations must configure the environment properly to prevent gaps that cybercriminals can exploit.

Why Conduct a Security Audit?

Consider the dangers if:

  • A remote worker’s laptop with cached credentials or files is stolen.
  • An attacker gains control of user mailboxes in Exchange Online.
  • A compromised SharePoint site exposes sensitive financial or HR data.
  • A disgruntled employee leaks intellectual property via Teams.
  • You need legal discovery of email content or Teams chats that were already deleted.

A security audit uncovers such risks and provides the necessary steps to maintain robust protection of your data.

Benefits of a Security Audit

  • Identify who is sharing sensitive data within SharePoint, OneDrive, or Teams.
  • Enforce strong authentication policies and protect accounts with Azure Multi-Factor Authentication (MFA).
  • Ensure reliable backup and recovery options for accidentally or maliciously deleted data.
  • Discover advanced security settings in Exchange Online, OneDrive, SharePoint, and Microsoft Teams.
  • Minimize the risk of unauthorized access across mobile devices, desktops, and browsers linked to Microsoft 365.

Basic Audit

Our Basic Security Audit covers essential security checks across various Microsoft 365 services, examining over 150 risk factors in these key areas:

  1. Identity and Authentication

    • Azure AD user account recovery, password policies, MFA, and Single Sign-On (SSO).

  2. Administration

    • Access control for global and delegated administrators, plus eDiscovery and compliance settings.

  3. Application Integration

    • OAuth consent management, third-party app permissions, and add-in usage for Office apps.

  4. Security Operations

    • Configurations in the Microsoft 365 Defender portal, alert policies, incident response processes.

  5. Mail (Exchange Online)

    • Email authentication (SPF, DKIM, DMARC), encryption, data retention, anti-spam, and DLP rules.

  6. File Storage (SharePoint and OneDrive)

    • Access and sharing settings, sync policies, conditional access, and data loss prevention configurations.

  7. Teams and Collaboration

    • External sharing controls, channel management, compliance rules, and logging for Teams activities.

  8. Device Management

    • Microsoft Intune policies for mobile devices and desktops, browser security baselines.

Extended Audit

Additional Areas in an Extended Security Audit

The Extended Audit includes all Basic Audit steps plus deeper investigations:

  • Comprehensive File-Sharing Analysis
    Detailed export of sharing permissions for SharePoint team sites, OneDrive, and Teams file libraries.

  • Browser and Desktop Audits
    Validation of security-critical browser settings and desktop policies via Intune or Group Policy.

  • External Applications and Integrations
    Full export of third-party applications authorized to access Microsoft 365 data, including analysis of granted permissions.

Rhyno Security Audit Process

Our methodology spans five stages over approximately four weeks:

  1. Kick-off Meeting

    • Align on objectives, finalize scope, and assign responsibilities for the audit.

  2. Audit Execution

    • Perform an in-depth review of your Office 365 and Microsoft 365 security settings.

  3. Recommendations

    • Present a detailed, prioritized set of actionable measures to fortify cybersecurity defenses.

  4. Presentation

    • Walk through the recommended steps with your team, address unique concerns, and share best practices.

  5. Certificate

    • Provide a formal document confirming completion of the security audit.

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