White Paper · 30 pages · Updated Q2 2026

Microsoft E5 Security Stack Licensing Guide.

The benchmark research behind a 20–35% reduction in Microsoft security-stack spend. The E5-versus-add-on math, the persona-mapping model, the Intune/EMS overlap map, the Purview scoping framework, and the Sentinel ingestion-tier sizing that stops the SOC paying analytics rates for free and low-value logs.

What's inside

Six things the Microsoft security pitch won't volunteer.

01
E5 vs E5 Security add-on vs standalone
The per-user math at $57 full E5, ~$48 for E3 + add-on, and $25–30 for standalone components — and why the add-on path wins for security-only buyers.
02
The persona-mapping model
How to segment the workforce so privileged and high-risk users get E5-grade protection and the rest sit on E3 or F-SKUs.
03
The Intune/EMS overlap map
Where EMS duplicates entitlement already inside E5, and whether the Intune Suite add-on earns its ~$10 beyond the admin and frontline subset.
04
The Purview scoping framework
Why Insider Risk and Communication Compliance are the most over-deployed lines, and how to scope premium Purview to the regulated population.
05
Sentinel ingestion-tier sizing
The analytics vs auxiliary vs free-E5-log split, the commitment break-even table, and the 20–40% SOC saving from re-tiering.
06
The renewal timeline
When to start the persona mapping and log-tiering before the EA so the entitlement count works for you, not Microsoft.
The numbers up front

Four benchmarks from the field.

20–35%
Security-stack spend that is typically duplicated entitlement
~$12
E5 Security add-on vs $25–30 to assemble the same stack standalone
20–40%
Sentinel ingestion cost recoverable by re-tiering log sources
68%
Average audit-claim reduction across our engagements
Who it's for

Four roles get the most value.

For
CISOs
Standardising the security stack without paying for overlap between suite, add-on and standalone SKUs.
For
CIO & IT Procurement
Negotiating the E5 mix, EMS lines and Sentinel commitment as one portfolio ahead of an EA renewal.
For
SOC & Cloud FinOps
Sizing Sentinel ingestion across analytics, auxiliary and free-E5 tiers.
For
Compliance
Scoping premium Purview to the regulated population rather than the whole estate.

"We were about to buy full E5 for every user to 'get the security.' The guide showed us the E3-plus-add-on path delivered identical protection for the security personas, and that we were already paying for EMS components inside the E5 we did hold. The corrected count moved the renewal by seven figures."

CISO
Benchmark scenario from a Reveal Compliance engagement, not a quote
Research · 30 pages · PDF
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