Research Hub > How Businesses Can Enhance Security for Legacy Applications

December 17, 2025

Case Study
3 min

How Businesses Can Enhance Security for Legacy Applications

Discover how CDW helped a rural insurance provider modernize access for a legacy application that lacked support for current authentication methods.

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Challenges of legacy applications

62%

of organizations still use legacy systems1

71%

cite lack of time as the primary factor preventing them from modernizing2

How can IT support modern security without disrupting the user experience?

A REAL-WORLD EXAMPLE

Modernizing Access Management

A rural insurance provider had a challenge when it came to the legacy application that supported its business across several states. While the application itself still met all the business’s needs and provided a friendly user interface employees appreciated, it didn’t support modern authentication methods for access management, which represented a security risk.

THE TURNING POINT

Protecting Data and Preserving Productivity

CDW solved the complex identity challenge with secure solutions using the Auth0 authentication platform, architected and deployed for multi-environment integration. The solution was enhanced with Microsoft Entra ID and custom Azure functionality that enabled modern authentication protocols without requiring application refactoring.

The authentication interface was also fully branded for a consistent experience, and the CDW team configured Auth0 Event Triggers for automatic data updates.

THE RESULTS

Streamlined Access with Modern Security

Colleagues collaborate around a computer in a brightly lit modern office.

CDW’s team of experts demonstrated the flexibility and extensibility of the Auth0 authentication platform in transforming constrained authentication environments into secure ecosystems. This robust solution extended modern identity capabilities to the mission-critical legacy application, bolstering security and simplifying user access.

Here’s why it worked:

  • Custom functionality enabled modern authentication without requiring application refactoring 
  • CDW provided Microsoft Entra ID federation for secure SSO for internal users 
  • CDW’s dedicated service and engineering expertise ensured flawless implementation

What’s next?

By establishing a scalable user access foundation, the insurance organization will be well prepared for future modernization efforts and cloud integrations.

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Sources: 
Saritasa, “Legacy Software Modernization in 2025: Survey of 500+ U.S. IT Pros,” August 2025
Growth Acceleration Partners, “2025 State of Legacy Development and Modernization,” March 2025

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