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How to Secure Your Business in the Age of AI: Understanding Microsoft Purview and Defender

Published 13/05/2026

Author: The CPS Team

Artificial Intelligence is transforming how organisations work. Tools like Microsoft Copilot, automation platforms, and AI-powered analytics are helping businesses improve productivity, streamline operations, and unlock new insights. 

However, as organisations adopt AI, security and governance become more important than ever. 

AI systems interact with vast amounts of organisational data, including: 

  • Business documents 
  • Emails and communications 
  • Customer information 
  • Financial data 
  • Intellectual property 

Without the right protections in place, organisations risk exposing sensitive data or introducing new vulnerabilities. 

This is why security must be a core part of any AI strategy. 

Microsoft provides powerful security and compliance solutions designed to help organisations adopt AI safely, including Microsoft Purview and Microsoft Defender. 

In this guide we explore: 

  • Why security is critical when adopting AI 
  • What Microsoft Purview is 
  • What Microsoft Defender does 
  • How these tools work together to protect organisations 

Why AI Security Matters

AI tools rely heavily on data to generate insights and responses. As a result, organisations must ensure that data access, governance, and security policies are properly managed. 

Common AI-related security concerns include: 

  • Sensitive data being accessed unintentionally 
  • Employees sharing confidential information with AI systems 
  • Data leakage through prompts or generated content 
  • Increased exposure to cyber threats 

Without proper controls, AI tools could potentially surface information that should remain restricted. 

A strong security framework ensures organisations can benefit from AI innovation while maintaining full control of their data. 

What is Microsoft Purview?

Microsoft Purview is a data governance, compliance, and risk management platform. 

It helps organisations understand where their data is located, how it is used, and how it should be protected. 

Purview enables businesses to manage and protect data across environments including: 

  • Microsoft 365 
  • SharePoint and OneDrive 
  • Email systems 
  • Business applications 
  • On-premise systems 
  • Cloud environments 

Key Capabilities of Microsoft Purview

Purview provides a range of capabilities that support data security and compliance. 

Data Classification

Purview automatically identifies and labels sensitive information such as: 

  • Personal data 
  • Financial information 
  • Confidential documents 

This helps organisations understand what data they hold and how it should be protected. 

Data Loss Prevention (DLP)

DLP policies prevent sensitive information from being shared incorrectly. 

For example, organisations can block: 

  • Sharing confidential documents externally 
  • Sending sensitive data via email 
  • Uploading protected files to unauthorised locations 

Information Protection

Purview enables organisations to apply labels and protection to documents, ensuring only authorised users can access them. 

Compliance and Governance

Purview helps organisations meet regulatory requirements by supporting governance policies, auditing, and compliance monitoring. 

What is Microsoft Defender?

While Purview focuses on data protection and governance, Microsoft Defender focuses on security threats and cyber protection. 

Microsoft Defender is a suite of security tools designed to protect organisations from: 

  • Malware and ransomware 
  • Phishing attacks 
  • Identity compromise 
  • Suspicious activity across systems 

Defender continuously monitors environments to detect and respond to potential threats. 

Key Capabilities of Microsoft Defender

Threat Detection

Defender identifies suspicious behaviour across endpoints, applications, and identities. 

Identity Protection

Defender helps detect compromised accounts or unusual sign-in activity, preventing attackers from accessing systems. 

Endpoint Security

Devices such as laptops and servers are protected against malware and other threats. 

AI-Powered Security

Defender uses advanced analytics and AI to identify patterns that may indicate cyber attacks. 

How Purview and Defender Work Together

Microsoft Purview and Defender provide complementary layers of protection. 

Together they help organisations: 

  • Protect sensitive data 
  • Monitor user activity 
  • Detect cyber threats 
  • Maintain compliance 
  • Secure AI-enabled environments 

This combination ensures organisations can adopt technologies like Microsoft Copilot and automation tools without increasing security risk. 

Preparing Your Organisation for Secure AI Adoption

Before adopting AI solutions, organisations should consider several important steps: 

  • Review existing data governance policies 
  • Identify sensitive data locations 
  • Implement classification and protection controls 
  • Strengthen identity and access management 
  • Monitor security threats across systems 

These measures ensure AI tools operate within a secure and well-governed environment. 

Supporting Secure AI Adoption with CPS

At CPS, we help organisations adopt AI technologies while maintaining strong security and governance. 

Our services include: 

  • AI readiness and security assessments 
  • Microsoft Purview implementation 
  • Microsoft Defender configuration 
  • Data governance frameworks 
  • Secure Copilot adoption 

By combining AI expertise with Microsoft security capabilities, CPS helps organisations unlock the benefits of AI without compromising data protection. 

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