This case study describes a 5,600-employee food service distributor that, with a small security team, could not sustain 24x7x365 coverage or handle alert volume that reached about 50,000 per month, creating blind spots, alert fatigue, and unacceptable business risk given the downstream impact of disruptions on thousands of customer locations (pages 1–2). They selected Critical Start MDR for Cortex XDR, Microsoft 365 Defender, and their SIEM, citing dependable, human-driven investigations, deep integration with existing tools, and MobileSOC for after-hours containment from anywhere (pages 2–3). After adoption, Critical Start resolved all alerts regardless of priority and escalated only real threats, including a quickly flagged abnormal Microsoft 365 mailbox rule that helped stop a phishing

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