Published On: 24. March 2026

NIS2 meets ISO 27001:
How access management becomes a compliance lever

The NIS2 Directive has changed the cybersecurity landscape for thousands of European companies since it came into force. Medium and large organizations in critical sectors such as energy, healthcare, financial services and digital infrastructure are particularly affected. For many managers, the question is: how can the extensive requirements be implemented efficiently?

The good news is that those who already work according to ISO 27001 have a decisive head start. And one area is proving to be particularly effective: access management. This shows how the right technical support can make the difference between tedious compliance work and an efficient security strategy.

 

ISO 27001 as a strategic foundation for NIS2

ISO 27001 and NIS2 are not opposites, but complement each other perfectly. The international standard establishes a systematic framework for information security with risk analysis, documented processes and continuous improvement. And that is exactly what NIS2 requires.

According to analyses by DataGuard, ISO 27001 already covers 70-80% of the technical and organizational measures prescribed by Article 21 of the NIS2 Directive. The main differences lie in the extended reporting obligations for security incidents, the more intensive consideration of supply chains and the explicit management responsibility. Organizations with existing ISO certification must therefore mainly close specific gaps.

The real problem is not the quality of the information, but its form: Without a standardized data model, information remains trapped in proprietary formats. It cannot be processed automatically, cannot be reused consistently and cannot be exchanged efficiently between systems. Notified bodies spend valuable time on formal structural checks instead of concentrating on content-related, risk-oriented assessment.

Why access management takes center stage

Article 21 of the NIS2 Directive explicitly requires measures for “access control” and “management of access rights”. These requirements are specific: organizations must be able to prove who can access what, when and why.

The link between NIS2 and ISO 27001 is particularly clear here. ISO Control A.5.15 (Access Control) corresponds directly with the required access policy, Control A.5.18 (Access Rights) covers rights management, while A.8.2 (Privileged Access) regulates the management of privileged accounts. These mappings are actively used by auditors, as the official BSI mapping tool shows.

The practical challenge: companies today manage access rights across dozens of systems, including Active Directory, file servers, SharePoint, cloud applications and databases. Manual processes inevitably lead to errors, delays and a dangerous proliferation of authorizations.

The critical access management requirements

  • Least privilege and privileged accounts:
    Both frameworks require that each user is only granted the minimum necessary access rights. Privileged accounts with far-reaching system access are particularly critical. These require multi-factor authentication, seamless logging and regular audits – requirements that NIS2 explicitly defines in Article 21 and ISO 27001 in Control A.8.2.

  • The complete access lifecycle:
    The European Cybersecurity Agency ENISA describes five critical phases: Request, Approval, Assignment, Review and Removal. Each phase must be documented and traceable.

  • The most critical phase is the removal phase:
    If an employee leaves the company, all access rights must be revoked immediately and completely across all systems. Remaining access rights of former employees are a serious compliance violation that is regularly criticized during audits.

  • Recertification as a verification requirement:
    Managers must confirm at least once a year, or quarterly for sensitive areas, that their employees actually need the assigned access rights. These reviews regularly uncover excessive authorizations and are critical audit evidence. Without systematic support, however, this process degenerates into illegible Excel lists.

  • Seamless documentation:
    NIS2 not only requires security measures, but also their documented effectiveness. Every access to critical systems, every authorization change, every failed login must be logged in a tamper-proof manner. These logs must be analyzable and stored for defined periods of time.

  • Supply chain security:
    One new feature of NIS2 is the explicit focus on supply chains. Access by external service providers must be particularly strictly controlled: limited in time, logged and regularly checked. Many organizations grant overly generous permanent access that is not revoked at the end of the project.

The limits of manual processes

The complexity quickly becomes overwhelming: a company with 500 employees, moderate staff turnover and a typical IT landscape generates hundreds of access requests per year. Manual processes mean:

  • IT teams spend hours on ticket processing instead of strategic security work
  • Managers lose time in inefficient review processes
  • Employees wait for required access instead of working productively
  • Errors are unavoidable, compliance gaps go unnoticed
  • Audit evidence must be laboriously compiled from various sources

A study by the Aberdeen Group puts the average cost of processing a single Access request at 40-60 euros. With several hundred requests per year, this quickly adds up to a considerable cost factor, not to mention the security risks.

 

NIS2-trifft-ISO-27001

What modern access management solutions need to achieve

Efficient compliance with NIS2 and ISO 27001 requires more than goodwill. Modern access management systems must offer several core functions:

  • Cross-system integration:
    The solution must be able to connect a wide variety of target systems, from file servers to SharePoint and cloud applications. This is the only way to manage authorizations centrally and avoid dangerous blind spots.

  • Automated workflows:
    From onboarding new employees to offboarding, standardized processes must be in place to ensure that no access is forgotten. Automation drastically reduces errors and speeds up processes.

  • Self-service with governance:
    employees should be able to request access independently, while the system automatically checks compliance rules, such as separation-of-duties conflicts. Managers approve transparently via central portals.

  • Efficient recertification:
    Instead of Excel lists, managers need clear dashboards that manage reviews and document them in an audit-proof manner. This saves time and provides exactly the evidence that auditors want to see.

  • Tamper-proof documentation:
    Every change, every access, every authorization must be logged without gaps. Audit reports should meet the strict requirements of NIS2 and ISO 27001 at the touch of a button.

  • Temporary access for external parties:
    Suppliers and service providers require time-limited, precisely defined access that runs automatically. This fulfills the NIS2 requirements for supply chain security without administrative overhead.

Conclusion: Compliance through intelligent automation

NIS2 and ISO 27001 place clear requirements on access management and these can hardly be met with manual processes. The good news: with the right technical support, the compliance challenge becomes an efficiency gain.

Companies that invest in professional access management solutions now will benefit in several ways: through compliance security, drastic efficiency gains, reduced security risks and measurable cost savings. The BAYOOSOFT Access Manager addresses precisely these requirements and supports organizations in using NIS2 and ISO 27001 not as a burden, but as an opportunity for better security standards.

How we support you

Your solution for file servers, SharePoint, Active Directory and third-party systems – From standardizing user and authorization management to supporting the provision of IT services: Optimize entire process chains with the BAYOOSOFT Access Manager and sustainably reduce operational costs while increasing information security.

FAQ: NIS2, ISO 27001 & Access Management

ISO 27001 covers about 70-80% of the NIS2 requirements. Organizations with existing ISO certification must mainly supplement reporting obligations, supply chain security and management responsibility.

NIS2 Article 21 requires access policies, rights management, control of privileged accounts, multi-factor authentication, least privilege and complete documentation of all accesses.

At least annually, quarterly for sensitive areas. The recertifications must be documented and verifiable – a frequently checked compliance point.

All access rights must be revoked immediately and completely across all systems. Remaining access by former employees is a serious compliance violation.

Manual processes lead to errors, delays and compliance gaps. Hundreds of access requests per year result in high costs and considerable security risks.

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Is your company looking for a strong partner for management software solutions?

Contact us now and we will introduce you to our products without obligation.