Securing Legal Expertise: A Microsoft 365 Security Assessment


A UK based solicitors.

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M365 Security Assessment

Project Detail

In the competitive and confidentiality-driven world of legal services, a mid-sized solicitors firm, with over 50 employees, embarked on a digital transformation journey by adopting Microsoft 365 (M365). This transition aimed to enhance collaboration, productivity, and client service delivery. However, the rapid deployment, aimed at maintaining operations amidst growing cybersecurity threats, raised significant concerns about the protection of sensitive client information and internal communications.


The solicitors firm’s shift to M365, while strategic, lacked a comprehensive security framework, exposing critical client data and proprietary information to increased risk of cyber-attacks. The firm faced challenges in ensuring data privacy and regulatory compliance, crucial for maintaining client trust and adhering to legal industry standards. The primary concerns included potential data breaches, unauthorised access, and the risk of compromising client confidentiality and integrity.


Metis Security was engaged to conduct a exhaustive security assessment of the firm’s entire M365 deployment. The assessment aimed to identify vulnerabilities, evaluate risk levels, and implement a tailored security strategy that addressed the unique needs of the legal sector.

The solution deployment involved:

  • Tightening Identity and Access Management: Implementing strict access controls and enabling multi-factor authentication (MFA) to ensure that only authorised personnel could access sensitive information.
  • Data Protection Enhancements: Configuring data loss prevention (DLP) policies and rights management services to protect client data both in transit and at rest, ensuring compliance with legal standards for data protection.
  • Advanced Threat Protection: Activating advanced threat protection features across email and collaboration tools to detect and mitigate threats such as phishing, malware, and ransomware attacks.
  • Secure Collaboration Practices: Establishing secure channels for internal and external communications with encryption, ensuring that client consultations and document exchanges remained confidential.
  • Compliance and Governance: Assessing regulatory compliance needs and implementing governance policies to manage data retention, eDiscovery, and legal hold requirements effectively.


The comprehensive security overhaul significantly enhanced the firm’s cybersecurity posture, mitigating the risk of cyber threats and data breaches. Key outcomes included:

  • Reduced Exposure to Cyber Threats: The implementation of advanced security measures drastically lowered the firm's vulnerability to cyber-attacks, safeguarding client information and firm communications.
  • Strengthened Compliance and Data Protection: The firm achieved a high level of compliance with legal industry regulations and standards, reinforcing client trust and confidence in the firm's ability to protect sensitive information.
  • Enhanced Client Service Delivery: With a secure and robust M365 environment, the solicitors firm was able to offer more efficient and secure client services, leveraging the full potential of digital collaboration tools without compromising security.


Metis Security’s intervention transformed the solicitors firm’s approach to cybersecurity, aligning it with best practices and industry standards. The project not only addressed immediate security concerns but also laid a foundation for ongoing risk management and compliance. As the firm continues to navigate the complexities of the legal landscape, its commitment to cybersecurity excellence ensures that it remains a secure, reliable, and forward-thinking partner to its clients. The case study exemplifies how tailored cybersecurity assessments and solutions can empower organisations in sensitive sectors like legal services to embrace digital transformation securely and confidently.