Introduction
Microsoft 365 E3 and E5 are the two enterprise plans most organizations evaluate once they pass ~300 users or need advanced security and analytics. Both include full Office, Exchange Online, Teams, SharePoint, and baseline Microsoft security services — but E5 adds a large layer of threat protection, compliance, and business intelligence.
Pricing below matches our published enterprise pricing (per user / month).
E3 vs E5 at a glance
| Enterprise E3 | Enterprise E5 | |
|---|---|---|
| THB / user / mo | S$55 | S$85 |
| SGD / user / mo | S$55 | S$85 |
| Desktop Office | Yes | Yes |
| Exchange Online (Plan 2) | Yes | Yes |
| Teams, SharePoint, OneDrive | Yes | Yes |
| Defender for Office 365 | Plan 1 | Plan 2 |
| Microsoft Intune | Yes | Yes |
| Entra ID P1 | Yes | Yes (P2 features in E5) |
| Power BI Pro | — | Included |
| Advanced compliance (eDiscovery, audit) | Baseline | Expanded |
| Microsoft Defender for Endpoint | Baseline | Advanced / XDR options |
Use our feature matrix for a column-by-column view across all plans.
When E3 is the right default
E3 is the enterprise productivity + identity baseline:
- Full desktop Office for knowledge workers
- Email, calendaring, and archival headroom with Exchange Online Plan 2
- Teams phone system readiness (licensing for PSTN is separate)
- Intune and Entra ID P1 for device and access management
- Defender for Office 365 Plan 1 (safe attachments/links in email)
Choose E3 if: You need enterprise scale and compliance foundations but already have a SIEM, DLP strategy, or BI platform elsewhere — or you are cost-constrained on per-seat security add-ons.
What E5 adds (and who needs it)
E5 is E3 plus advanced security, compliance, and analytics:
- Defender for Office 365 Plan 2 — automated investigation and response for email threats
- Defender for Endpoint Plan 2 — endpoint detection and response (EDR)
- Microsoft Purview advanced compliance — legal hold, eDiscovery, insider risk (where licensed)
- Power BI Pro — self-service analytics for every licensed user
- Entra ID P2 — identity protection, privileged identity management patterns
Choose E5 if: You are in regulated industries (finance, healthcare, legal), face advanced phishing and ransomware risk, or want Microsoft-native BI without a separate Power BI purchase.
Avoid paying for E5 if: You will not enable advanced security workloads — many features require security team time to deploy and tune.
Common misconceptions
“E5 is just more storage.” No — storage is similar; the jump is security and compliance services.
“We can start on E3 and upgrade seat-by-seat.” Yes, Microsoft supports mixed licensing in a tenant, but plan the upgrade path before audit season.
“Enterprise means unlimited users.” There is no upper cap, but licensing is still per user; frontline and contractor roles may be cheaper on F1/F3 plans.
How this fits Thailand & Singapore operations
- Both markets see strong E3 adoption for regional HQ and shared services.
- E5 interest often follows PDPA (Thailand) and PDPA/GST audit (Singapore) pressure plus board-level security mandates.
- We quote E3/E5 in THB or SGD with local tax invoices — see payment options.