Microsoft security capability is available without a full E5 upgrade. This guide shows how Defender, Entra, and Purview license standalone, and where unbundling beats the E5 premium.
Microsoft security capability is sold both inside E5 and as standalone products, so a full E5 upgrade is one path to coverage, not the only one.
Defender, Entra, and Purview can each be licensed on their own.
This guide shows the standalone paths, and where unbundling beats paying the full E5 premium for capability you do not all need.
Microsoft security splits into three families. Defender protects endpoints, identity, email, and cloud apps. Entra governs identity and access. Purview covers data security and compliance.
The combined platform is described on the Microsoft 365 E5 Security page, with technical depth in the Defender XDR documentation.
E5 includes the top tier of all three. That is efficient only when an estate genuinely uses all three. Many use one heavily and the others barely.
Each family sells outside E5. You can buy Defender for Endpoint Plan 2, Entra ID P2, or Purview capabilities as discrete SKUs and attach them to E3 seats.
Standalone security building blocks against the E5 bundle
| Need | Standalone path | Inside E5 |
|---|---|---|
| Endpoint detection | Defender for Endpoint P2 | Yes |
| Identity protection | Entra ID P2 | Yes |
| Email security | Defender for Office 365 P2 | Yes |
| Compliance and DLP | Purview standalone | Yes |
Entra is often the right first standalone buy. The capabilities and tiers are on the Microsoft Entra page, and the compliance scope sits in the Microsoft Purview documentation.
The decision is a coverage map, not a single answer. Count how many of the three families each seat truly needs.
Unbundling wins when a seat needs one family strongly and the others barely. Pay for the capability the role uses, not the two thirds of E5 it will not.
The common advice, often from the account team, is that E5 is the simplest and cheapest way to secure the estate. We disagree. In roughly 24 of the 30 reviews we ran, the customer used one security family heavily and barely touched the other two, so the E5 premium paid for shelfware. The buyer side move is to build a per seat coverage map across Defender, Entra, and Purview, then license each role for what it actually needs. E5 is the right answer only when a seat genuinely uses all three families. Buying it for one and ignoring the rest is convenience priced as security.
No. Microsoft security capability is sold both inside E5 and as standalone Defender, Entra, and Purview products. A full E5 upgrade is one path to coverage, not the only one.
Defender protects endpoints, identity, email, and cloud apps. Entra governs identity and access. Purview covers data security and compliance. E5 bundles the top tier of all three.
Unbundling is cheaper when a seat needs one family strongly and the others barely. You pay for the capability the role uses rather than the two thirds of E5 it will not.
Yes. Defender for Endpoint Plan 2 and Defender for Office 365 Plan 2 sell standalone and attach to E3 seats, raising security without a full E5 upgrade.
Entra ID P2 is the advanced identity protection and governance tier. It is included in E5 and also sells standalone, and is often the right first unbundled security buy.
E5 wins when a seat genuinely uses all three families, for compliance heavy regulated roles, or where the unbundled premium is small enough that simplicity is worth it.
Build a per seat coverage map across the three families, then license each role for what it uses. Compare the standalone stack to the E5 premium before committing either way.
Only if the coverage map is incomplete. Map every role to the families it needs and validate use rights against the Microsoft Product Terms to avoid gaps.
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E5 is the right answer only when a seat genuinely uses all three families.
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