Ethical Hacking in Microsoft 365 – How to Realistically Test Your Company’s Security and Prepare for an Audit
Security of the Microsoft 365 environment has ceased to be a purely technical topic and has become a strategic element for executive management. In practice, most successful attacks on companies in Poland do not result from advanced hacking techniques, but from configuration errors, lack of identity control, and improper access management. This is why Microsoft 365 audits conducted using an ethical hacking approach are becoming increasingly important. This article explains what ethical hacking means in the context of Microsoft 365 and how a professional security audit conducted by Security Masters looks in practice—led personally by a Microsoft 365 MVP, ethical hacker, and former Microsoft Poland and Ireland employee, Damian Wróblewski, together with a specialized team.
What is Ethical Hacking in Microsoft 365
Ethical hacking is the controlled and legal testing of an
organization’s security in the same way a real attacker would do it.
The difference is that the process is structured, documented, and
focused on improving security.
WIn a Microsoft 365 environment, this includes, among others:
- analysis of the possibility of user account takeover
- verification of Microsoft Entra ID configuration vulnerabilities
- checking whether MFA can be bypassed
- analysis of administrator permissions and privilege escalation
- assessment of risks resulting from application integrations and external access
This is not theory. This is a practical verification of whether someone can enter your organization without your knowledge.
Why a Microsoft 365 Audit Is Now a Necessity
For small and medium-sized companies, an audit is often the first real look at the organization’s security. In many cases, it turns out that:
- administrator accounts are not properly secured
- MFA is not enforced globally
- guest access to data is uncontrolled
- security policies exist only on paper
For large organizations, the situation is even more formal. Regulations such as NIS-2 or KSC explicitly require regular security audits. In practice, this means audits must be performed at least once a year. A Microsoft 365 NIS-2 audit and an ISO 27001 Microsoft 365 audit are no longer optional. They are mandatory.
Frequently Asked Questions in the Area of Microsoft 365 Audits
- What does a professional Microsoft 365 audit look like in practice?
- Introduction to the Microsoft 365 Environment Assessment Report – what is it?
- Current State and Key Risks – Risk Analysis Element
- Technical Analysis of the Consequences of Missing Security Controls – how does it work in practice?
- Business Summary for Executive Management – what real value does it provide?
- Audit Methodology and Scope
A professional Microsoft 365 audit is not a one-time settings review or a report generated by a tool. It is a structured process that combines technical expertise, real incident experience, and an offensive approach typical of ethical hacking. The goal is not to show “what can be improved,” but to identify real attack scenarios and define specific actions that eliminate risk.
The audit begins with understanding the organization as a whole. The business model, user workflows, organizational structure, and IT and security maturity level are analyzed. A manufacturing company environment differs from a logistics company, and both differ from a multinational organization. At this stage, critical business assets are identified—data and processes whose loss or compromise would have the greatest impact on operations. This ensures the audit is grounded in reality and focused on what truly matters.
The next step is a detailed analysis of the current Microsoft 365 environment configuration. In practice, this means reviewing the entire tenant, users, permissions, and security mechanisms. Specific vulnerabilities that could be exploited by an attacker are identified. Examples include lack of enforced MFA, overly broad administrator permissions, uncontrolled guest access, misconfigured Conditional Access, or lack of login monitoring. This is not just a list of best practices—it is a list of real issues that can be exploited for a breach. Importantly, the audit is part of a broader Risk Analysis, which every organization is required to perform—not only for its own protection, but also for its clients, contractors, and partners.
The greatest value of an audit lies in demonstrating consequences. The fact that something is misconfigured does not always resonate with organizations. Only showing what can actually be done with that vulnerability changes perspective. At this stage, attack scenarios are presented. For example, we demonstrate whether it is possible to take over a user account, escalate privileges to administrator level, access data in SharePoint, or impersonate an employee to conduct a phishing attack. Each vulnerability is explained in both business and technical terms. This means answering the question: what will be the impact on the company? This may include data loss, operational disruption, information leakage, or legal liability.
The management board does not need dozens of pages of technical analysis. They need clear answers to three questions: what is the level of risk, where are the biggest threats, and what should be done first. Therefore, a business summary is prepared, translating audit results into management decisions in a clear and understandable way. Action priorities and potential consequences of inaction are highlighted. This is a critical element from a compliance perspective with regulations such as GDPR, DORA, NIS-2, or ISO 27001, where responsibility for security also lies with executive management.
The audit covers the entire Microsoft 365 environment and is not limited to a single area. The analysis is cross-sectional because most incidents result from a combination of weaknesses rather than a single error. Within Microsoft Entra ID, identity management, user configuration, guest accounts, and access policies are analyzed. We verify whether account takeover is possible and whether authentication mechanisms are resistant to attacks. In licensing, we assess how existing licenses impact the level of security. In many organizations, security features are available but not used—even though the company is paying for them. In the area of roles and administrators, a detailed analysis of privileged accounts is performed. We verify who has access to key functions and whether privilege escalation is possible. Device management and Intune include an assessment of workstation configurations, security policies, and device compliance. We verify whether endpoints truly meet security requirements and whether they can be used as an entry point into the organization. Exchange Online, SharePoint, and Teams are analyzed in terms of data protection, information sharing, and risks related to external access. We verify anti-phishing configurations, DLP policies, and file-sharing practices. Logging, monitoring, and detection mechanisms show whether the organization is capable of detecting an attack. Logs, data retention, alerts, MFA, and Conditional Access policies are analyzed. We verify whether the company can see incidents and respond to them.
A professional Microsoft 365 audit is, in reality, a simulation of an attack combined with a system-level analysis. Its purpose is not to produce a document, but to genuinely increase the organization’s level of security and prepare it for scenarios that are now standard in the cyber threat landscape.
