In Forrester’s Total Economic Impact (TEI) study commissioned by Microsoft (June 2025), the composite organization — a 10,000‑employee, $5 billion retail company — saw meaningful financial and operational benefits from adopting Microsoft Defender with Sentinel SIEM. Key quantified outcomes over three years (risk‑adjusted present value): - **$17.8 million in total benefits** versus **$5.2 million in costs**. - **$12.6 million net present value (NPV)**. - **242% return on investment (ROI)**. - **Payback period of about six months**. These results came from four main benefit areas: 1. **Vendor consolidation savings (60% cost reduction)**: By consolidating legacy agents, on‑premises hardware, and multiple multicloud security tools into Microsoft Defender and Sentinel, the composite organization saved **$12 million** in multicloud security costs. 2. **SecOps optimization (80% less incident response effort)**: Automation, AI‑driven detection, and better signal correlation reduced time spent on triage, investigation, and resolution, generating **$2.4 million** in productivity gains. 3. **Lower SOC engineering costs**: No‑code/low‑code automation and improved workflows reduced reliance on specialized engineering and external contractors, cutting operational overhead by **$513,000**. 4. **Reduced breach impact (75% reduction in exposure to external attack costs)**: Better visibility, faster detection, and more decisive response helped the composite organization avoid or reduce breach‑related costs by **$2.8 million**. On the cost side, the three‑year investment included: - **$5.1 million** for Microsoft Defender and Sentinel licenses (including Defender for Cloud and E5 security for 10,000 FTEs, with Sentinel ingesting 1 TB/day in Year 1 and scaling to 2 TB/day by Year 3). - **$109,000** for deployment and training over three years (roughly a six‑month rollout, starting with Sentinel and then adding other Defender capabilities). - **$20,000** for ongoing administration (about two hours per month of management effort). Beyond the numbers, interviewees highlighted that Defender helped them move from reactive firefighting to more proactive, engineering‑driven security operations, with broader visibility and a more resilient security posture.

Organizations in the study reported that Microsoft Defender, combined with Sentinel SIEM, reshaped their day‑to‑day SecOps work by unifying tools, automating routine tasks, and improving visibility across domains. Key operational improvements included: 1. **Faster incident handling** - **Mean time to acknowledge (MTTA)** dropped from **30 minutes to 15 minutes**. - **Mean time to resolve (MTTR)** shrank from **up to 3 hours to less than 1 hour** in many cases. - Overall **incident response effort was reduced by about 80%**. A CISO from a financial services firm noted that the time to detect, investigate, and resolve incidents “reduced quite significantly,” freeing analysts to focus on additional tasks and helping the team meet SLAs more consistently. 2. **Fewer false positives and better alert quality** - Native integrations across Microsoft Defender and Sentinel automatically correlate signals from different environments. - This correlation provides richer context out of the box, which: - Reduces false positives. - Speeds up alert prioritization. - Helps analysts focus on the alerts that matter most. 3. **Unified analyst experience and automation** - Defender builds on Sentinel’s data lake, graph, and SIEM capabilities to provide: - A **unified analyst console** for prevention, detection, and response. - **Predictive graphing** with real‑time posture insights. - Embedded **adversary‑level threat intelligence**. - **Agentic assistance** to guide and accelerate investigations. - SOC engineers can design **sophisticated workflows without deep coding skills**, which: - Reduces dependency on external contractors. - Standardizes and scales detection and response. 4. **Shift from reactive to proactive operations** - With fewer manual tasks and less alert noise, teams can: - Spend more time on proactive threat hunting. - Continuously refine detections and playbooks. - Improve SLA adherence and overall security posture. Overall, Defender helped organizations move away from siloed, tool‑heavy environments toward a more integrated SOC model, where analysts and engineers can work more efficiently and with clearer visibility into risk.

Interviewed organizations started from environments with many point solutions, on‑premises infrastructure, and hybrid or multicloud deployments. This created excess cost, operational complexity, and visibility gaps. Microsoft Defender, together with Sentinel SIEM, was used to simplify this landscape and improve risk management. Here’s how they approached it and what they achieved: 1. **Consolidating tools and infrastructure** - Organizations decommissioned: - Legacy agents on physical appliances. - Additional on‑premises security hardware. - Overlapping multicloud security products. - By consolidating onto Defender and Sentinel, the composite organization achieved a **60% reduction in vendor‑related security costs**, totaling **$12 million** in multicloud security savings over three years. - They also reduced data ingestion and consumption costs by centralizing logs and telemetry into Sentinel’s data lake. 2. **Lowering SOC engineering and operational overhead** - Defender’s automation and workflow capabilities allowed SOC engineers to: - Build and maintain detections and response playbooks without specialized coding. - Reduce reliance on external contractors. - Operate with more agility and precision. - This translated into **$513,000 in reduced SOC engineering costs** over three years. 3. **Reducing breach likelihood and impact** - By consolidating siloed systems into a unified platform, organizations gained **real‑time visibility into their risk landscape**. - Enhanced automation, data correlation, and proactive threat hunting helped: - Detect threats more accurately. - Respond faster and more consistently. - Shorten attacker dwell time. - As a result, the composite organization saw a **75% reduction in exposure to external attack costs**, avoiding or reducing breach‑related impacts by **$2.8 million**. 4. **Supporting team health and resilience** - Before Defender, many teams struggled with: - Tool sprawl and complex workflows. - High alert volumes and false positives. - Burnout and difficulty maintaining a strong security posture. - With a more unified and automated SecOps platform, organizations reported: - Less time spent on repetitive, manual tasks. - More capacity for strategic work and proactive defense. - Improved collaboration between analysts and engineers. In short, organizations used Microsoft Defender not just as another tool, but as a way to reimagine their SOC stack: consolidating vendors, simplifying operations, and strengthening their ability to prevent, detect, and respond to threats while managing costs more predictably.