This guide explains how Microsoft Defender XDR and Microsoft Sentinel work together. An alert is a single suspicious event, an incident groups related alerts into one attack story, and an investigation establishes scope and root cause. Defender XDR correlates signals from endpoint, email, identity and cloud app products and lets you respond directly, while Sentinel adds non-Microsoft sources such as firewalls, VPNs, servers and business apps, keeps them longer and lets you write your own detections.
Collect logs that answer who signed in, what ran on which device, what came in and went out, and who changed what. Use KQL for clear, well-tuned detection rules, fight alert fatigue by tuning, grouping and classifying incidents, and automate low-risk steps first. Control Sentinel costs through data collection rules, storage tiers and monthly usage reviews, and keep a written incident response plan backed by tested backups. Pedante IT delivers this under the Racurity brand.
Talk to Racoun: we are based in Istanbul and work with brands across Türkiye. Message us on WhatsApp or email ekip@racoun.com.
