Overview
We recently completed a Microsoft Defender for Endpoint (MDE) Implementation and Security Validation engagement for one of the largest regional banks in the Northeastern United States. With over $18 billion in assets, more than 70 branches in the greater New York metropolitan area alone, and more than 150 years of banking experience, the organization operates within a highly regulated financial services environment with significant operational, security, and compliance requirements.
The engagement focused on deploying, validating, and optimizing Microsoft Defender for Endpoint within a highly regulated financial services environment, including comparative security validation against the organization’s existing CrowdStrike deployment. To support the migration effort, we developed and executed controlled attacker simulation exercises designed to measure detection and response effectiveness across both platforms under equivalent conditions. Through telemetry enhancement, policy optimization, and integration testing across Microsoft and third-party security platforms, the engagement provided the customer with clear and measurable insight into the effectiveness of their endpoint security capabilities, along with a practical roadmap to strengthen protection beyond their previous baseline.
This engagement highlights our ability to successfully implement and operationalize advanced security technologies within highly controlled enterprise environments while adapting to strict governance and access requirements without disrupting ongoing business operations.
The Challenge
The client was seeking to evaluate Microsoft Defender for Endpoint as part of a strategic transition from CrowdStrike while maintaining the same or greater level of endpoint detection and response capability across the enterprise environment. Because the organization operates within a highly regulated banking environment with billions in assets, extensive branch operations, and significant customer-facing infrastructure, the migration required clear evidence that Microsoft Defender for Endpoint could provide equivalent or improved security visibility, threat detection, and response effectiveness before broader adoption could move forward.
One of the most significant challenges throughout the engagement was the organization’s strict administrative access policy, which prohibited third-party vendors from making direct changes within production systems or maintaining privileged access to the environment. As a result, every implementation activity, policy adjustment, integration step, and validation exercise had to be performed collaboratively through live working sessions with client engineers who maintained full administrative control and access throughout the project.
Our team was required to guide implementation activities in real time while client engineers acted as the operational “hands on keyboard,” performing all changes through screen-shared sessions. This approach required substantially more coordination, communication, scheduling, and operational precision from both teams compared to a traditional implementation engagement.
Beyond deployment and operational coordination, the customer also required a true apples-to-apples comparison between Microsoft Defender for Endpoint and CrowdStrike. The organization needed confidence that the MDE platform would not introduce detection gaps or reduce security effectiveness during the migration process. This meant the engagement required not only deployment and configuration work, but also structured security validation and comparative detection testing across both platforms.
The engagement additionally involved integrating Microsoft Defender for Endpoint with multiple enterprise security technologies, validating coexistence with existing endpoint security tooling, and ensuring enhanced telemetry, monitoring, and alerting capabilities aligned with the institution’s operational and regulatory expectations.
What We Did
Digital Edge performed a structured Microsoft Defender for Endpoint implementation and security validation engagement focused on deployment readiness, operational integration, endpoint visibility, and comparative detection effectiveness.
As part of the engagement, we deployed Microsoft Defender for Endpoint across a defined pilot group of workstations and servers within the client environment to validate functionality, operational compatibility, and security effectiveness. The engagement included environment and compliance assessments, MDE configuration and policy development, firewall and connectivity configuration, and integration with Microsoft security platforms and SIEM solutions.
To strengthen endpoint visibility and monitoring capabilities, we implemented enhanced telemetry collection using SysMon, Windows Event Forwarding (WEF), and Azure monitoring components. These telemetry enhancements were designed to provide improved visibility into endpoint activity, support advanced detection use cases, and strengthen overall security operations capabilities.
A key component of the engagement was the creation and execution of a set of unique attacker simulation scenarios specifically designed to evaluate Microsoft Defender for Endpoint and CrowdStrike side-by-side under equivalent conditions. These simulations were developed to emulate realistic attack behaviors and techniques commonly associated with modern threat actors and ransomware operations.
Testing scenarios included simulated malware execution, ransomware activity, credential theft techniques, malicious PowerShell execution, persistence mechanisms, privilege escalation activity, suspicious process execution, and lateral movement scenarios. Each simulation was executed against both security platforms to provide the customer with a direct comparison of detection fidelity, alerting behavior, telemetry visibility, and response effectiveness.
This structured testing methodology provided the client with a clear and defensible apples-to-apples comparison between the existing CrowdStrike deployment and the proposed Microsoft Defender for Endpoint solution. The results allowed the organization to identify areas where MDE provided equivalent coverage, where detection gaps existed, and where additional tuning or policy enhancements were necessary to achieve or exceed existing protection levels.
Based on the results of these exercises, we developed detailed policy tuning and configuration improvement recommendations designed to enhance Microsoft Defender for Endpoint beyond its baseline deployment state. Rather than simply replicating CrowdStrike functionality, we worked closely with client engineering teams to optimize Microsoft Defender policies, alerting configurations, attack surface reduction settings, telemetry collection, and detection logic so the platform could ultimately surpass the protection capabilities of the legacy environment.
We also conducted integration testing across Microsoft 365, Microsoft Entra ID, Sentinel, Splunk, and other security technologies within the environment to validate interoperability, alerting workflows, and operational consistency across the broader security ecosystem.
Due to the client’s strict administrative access policies, all implementation and configuration activities were conducted through collaborative working sessions with internal engineers who maintained the necessary access throughout the project. This approach ensured compliance with internal governance requirements while facilitating operational transparency and hands-on knowledge transfer between teams.
Why We’re Proud
We are especially proud of this engagement because it demonstrates our ability to deliver meaningful security outcomes in highly regulated and operationally constrained enterprise environments while remaining flexible and collaborative throughout the process.
Rather than simply deploying Microsoft Defender for Endpoint, we helped the client make a data-driven and defensible security decision regarding a major endpoint security platform migration. By designing and executing a set of realistic attacker simulation scenarios against both MDE and CrowdStrike, we provided measurable insight into the comparative effectiveness of each platform under real-world conditions.
This engagement went beyond standard implementation services. We combined deployment, telemetry engineering, integration validation, adversarial testing, detection analysis, and policy optimization into a single coordinated engagement designed to improve both security visibility and operational confidence.
We are also proud of the adaptability demonstrated throughout the project. The client’s strict access requirements meant our engineers had to operate entirely through collaborative screen-shared implementation sessions with client personnel performing all administrative actions. Successfully completing a technically complex deployment and validation engagement under these constraints required exceptional coordination, communication, and partnership between both teams.
Most importantly, the outcome was not simply a deployed security product. The client received a validated and optimized Microsoft Defender for Endpoint deployment, enhanced telemetry and monitoring visibility, a detailed comparative analysis against CrowdStrike, and a prioritized roadmap of policy improvements designed to elevate endpoint protection capabilities beyond the organization’s previous baseline.
Digital Edge stands ready to support organizations evaluating their endpoint security strategy, providing the expertise and insight needed to validate detection and response capabilities before making critical decisions.
Learn more about how Digital Edge can help your organization assess and strengthen its endpoint security posture: Digital Edge Ventures
