Topic starter
02/08/2026 11:56 am
TL;DR: Microsoft Sentinel optimisation now looks like a routing problem, with DataBahn saying the real issue is deciding what telemetry should enter the SIEM first. Ingestion policy now shapes both cost and detection quality.
Editorial analysis by NHI Mgmt Group, based on content published by DataBahn: “The Ultimate Guide to Microsoft Sentinel Optimization for Enterprises”.
By the numbers:
- Microsoft Sentinel is used by about 13% of the SIEM market, according to DataBahn.
Key questions
Q: Why do enrichment and filtering need to happen before data reaches the SIEM?
A: Because enrichment changes the meaning of the event.
Q: What do SOC teams get wrong about Microsoft Sentinel cost control?
A: They often focus on query tuning and dashboard performance while leaving ingestion policy untouched.
Q: What breaks when SIEM optimisation is treated as a storage problem instead of a routing problem?
A: Teams end up paying to ingest and retain low-value telemetry, while analysts still have to separate signal from noise manually.
Practitioner guidance
- Define ingestion policies by source value Classify telemetry sources by investigation value, regulatory need and detection use case before they reach Microsoft Sentinel.
- Move enrichment upstream Attach threat intelligence, asset identity and user or workload context during collection or stream processing so routing decisions are made with context, not raw volume.
- Separate latency-sensitive lookups from the critical path Use pre-indexing, caching and asynchronous retrieval for enrichment feeds so external queries do not block ingestion or create queue buildup under burst conditions.
Bottom line: Microsoft Sentinel optimisation is no longer just about tuning queries or dashboards, because the real problem is controlling what telemetry deserves to enter the SIEM in the first place.
Glossary terms: SIEM Ingestion, Stream Enrichment, Telemetry routing, Pre-Ingestion Filtering
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This topic was modified 2 days ago by NHI Mgmt Group
02/08/2026 1:04 pm
Telemetry governance has become a security control, not an engineering afterthought. In SIEM programmes, the decision to ingest, enrich or discard data now shapes both cost and detection quality. That makes data routing part of the control plane for the SOC, especially when identity, asset and workload context determines whether an event is meaningful. Practitioners should treat telemetry policy as a governed security decision.
A question worth separating out:
Q: What should teams do when hybrid telemetry starts overwhelming SIEM budgets and analysts?
A: Teams should first identify which telemetry truly needs full-fidelity retention, then move filtering, masking, and enrichment closer to the source. If the same event can be routed to cheaper storage without harming detection, it should be. This is a governance problem as much as a cost problem.
👉 Read our full editorial: Microsoft Sentinel optimization exposes the real SIEM cost problem