Most organisations are concerned about Microsoft Copilot, but employees often present a greater risk by using AI tools without approval.
While IT teams discuss AI strategies, staff are signing up to ChatGPT, Claude, Gemini and countless AI-powered browser extensions to help them work faster. It usually comes from a good place. Employees want to save time, improve productivity, and reduce repetitive tasks. The problem is that many of these tools are adopted without oversight, governance, or security controls.
This growing phenomenon is known as Shadow AI and it is becoming one of the most significant security risks facing businesses today.
What Is Shadow AI?
Shadow AI refers to the use of artificial intelligence tools without the knowledge, approval, or governance of an organisation’s IT department.
The UK’s National Cyber Security Centre (NCSC) has highlighted the growing risks associated with AI adoption and the need for organisations to understand both the benefits and security implications of generative AI tools before introducing them into business processes.
Examples include:
- Using personal ChatGPT accounts for work tasks
- Uploading company documents to AI assistants
- Using AI browser extensions to summarise emails
- Connecting AI tools to company systems without approval
- Using personal AI subscriptions on company devices
Many organisations would be surprised to discover how many employees are already using AI tools daily. In most cases, IT teams have little visibility into what tools are being used, what data is being shared, or where that information is ultimately stored.
Why Employees Turn to AI Tools
The attraction is obvious. AI tools can:
- Draft emails in seconds
- Summarise lengthy documents
- Generate reports and presentations
- Assist with research
- Help write code
- Automate repetitive administrative tasks
For busy professionals, the productivity gains can be substantial. Employees often see AI tools as a quick solution to everyday challenges.
The problem is that convenience frequently overtakes security considerations.
An employee can paste meeting notes into ChatGPT to create a summary. Another may upload a spreadsheet to analyse data. Someone else might ask an AI assistant to rewrite a confidential proposal.
How Data Leakage Happens
One of the biggest concerns surrounding Shadow AI is the accidental exposure of sensitive information.
When employees interact with public AI tools, they may unknowingly submit:
- Customer information
- Employee records
- Financial reports
- Contract details
- Intellectual property
- Business strategies
- System credentials
Even if no malicious intent exists, sensitive information can leave the organisation’s controlled environment.
Many users assume that because an AI tool is widely used, it must be safe for business purposes. Unfortunately, that assumption can create significant compliance, legal, and security challenges.
The issue is not necessarily that employees are doing something wrong. The issue is that they often do not understand the risks involved.
The Governance Gap
Technology alone will not solve Shadow AI. Many organisations are rushing to deploy AI without first establishing clear governance.
Questions every business should be asking include:
- Which AI tools are approved for use?
- What data can employees share with AI systems?
- Who is responsible for managing AI risks?
- How should AI-generated content be reviewed?
- What regulations apply to AI usage within the organisation?
Without clear answers, businesses place themselves in a difficult position.
Employees continue using AI because it helps them work more efficiently. Meanwhile, leaders remain unaware of how company data is being handled.
This creates a governance gap that can quickly become a security problem.
Why Cyber Essentials Is Important
As AI adoption accelerates, organisations should also consider the implications for Cyber Essentials and broader cybersecurity best practices.
Cyber Essentials focuses on protecting organisations against common cyber threats. Developed by the NCSC and backed by the UK Government, Cyber Essentials is considered the baseline standard of cyber security for organisations of all sizes and is increasingly used as a supplier assurance requirement. While the framework was not originally designed around generative AI, many of its principles remain highly relevant.
For example:
- Controlling access to systems and data
- Managing user accounts securely
- Protecting sensitive information
- Reducing unnecessary risk exposure
If staff routinely enter confidential company information into unapproved AI tools, organisations may find themselves introducing new risks that bypass existing security measures.
As regulators, customers, and suppliers become more aware of AI-related risks, businesses will be expected to demonstrate that they are managing AI adoption responsibly.
Why Copilot Is Often a Safer Alternative
This is where Microsoft Copilot offers a compelling alternative to public AI tools.
Unlike public AI platforms, Microsoft Copilot operates within the Microsoft 365 ecosystem and works alongside existing security controls such as Microsoft Purview. This allows organisations to apply Data Loss Prevention policies, sensitivity labels, retention policies and compliance controls to AI interactions, helping to ensure that business data remains governed and protected.
This means businesses can apply:
- Existing access controls
- Data classification policies
- Sensitivity labels
- Identity management controls
- Compliance requirements
- Audit and monitoring capabilities
Rather than relying on personal AI accounts outside company oversight, organisations can provide employees with an approved enterprise-grade AI solution.
This allows staff to benefit from AI productivity gains while helping security teams maintain visibility and governance.
Copilot does not eliminate the need for proper security controls, but it enables AI adoption within a framework that most organisations already understand and manage.
How to Monitor AI Usage and Prevent Data Loss
Many business leaders assume they can control AI use simply by blocking ChatGPT. In reality, there are now hundreds of AI applications available. Blocking one platform rarely solves the problem. Instead, organisations need visibility.
Monitoring solutions can help identify:
- Which AI tools employees are using
- How frequently they are being accessed
- Whether sensitive information is being submitted
- Potential policy violations
- Emerging security risks
This is where Microsoft Purview becomes particularly valuable. Purview provides organisations with Data Loss Prevention (DLP) capabilities that help identify, classify and protect sensitive information across Microsoft 365. It can detect when users attempt to share confidential data, apply sensitivity labels, and enforce policies that reduce the risk of accidental exposure.
As organisations adopt AI, Purview can help ensure that sensitive information such as customer records, financial data, employee information and intellectual property remains protected. Rather than relying solely on employee awareness, businesses can apply technical controls to help prevent risky behaviour before it becomes a security incident.
For organisations looking for deeper visibility into AI usage, additional AI governance and monitoring solutions can help identify unauthorised AI applications, monitor user activity, and flag potential data leakage risks associated with public AI platforms.
The goal should not be to stop innovation; instead, it should be to enable safe adoption by giving employees access to AI tools while ensuring business data remains protected.
Need Help Governing AI in Your Business?
Lucidica can help you establish AI governance, implement data loss prevention controls, monitor AI usage, deploy Microsoft Copilot securely, and strengthen your overall AI security posture. We offer the solutions, expertise, and ongoing support necessary for organisations to adopt AI safely and responsibly.
As AI technologies continue to evolve, so do the risks. That’s why we’re constantly reviewing, improving, and expanding our AI governance and security solutions to help our clients stay protected while getting the most value from AI.
Get in touch with Lucidica today to discuss how we can help your business adopt AI with confidence.
