Licensing Guide
Is Microsoft 365 E3 Worth It?
E3 costs more than Business Premium and doesn't obviously look different on a feature list. Here's when the extra cost is actually justified.
The two real reasons to move to E3
Most organizations don't need E3 because of a single killer feature — they need it because of one of two structural constraints Business plans have.
- You're over 300 users. Business plans, including Premium, are hard-capped at 300 users. E3 has no cap.
- You need advanced compliance tooling. eDiscovery, legal hold, and deeper information governance aren't included in Business plans.
If neither applies to you
Business Premium delivers comparable day-to-day security — Intune device management, Defender for Business endpoint protection — at a lower cost per user. E3 isn't a meaningful upgrade in that case, just a more expensive one.
What E3 doesn't add
E3 doesn't include Defender for Business specifically (it has Defender for Office 365 Plan 1 instead) or the same device management depth as Business Premium by default — it's a different tool, not strictly a superset.
Quick Decision Guide
| Your Situation | Is E3 Worth It? |
|---|---|
| Under 300 users, no specific compliance mandate | Probably not — Business Premium covers this at lower cost |
| Over 300 users | Yes — it's your only option in this range besides E5 |
| Need eDiscovery / legal hold / advanced retention | Yes — Business plans don't offer this |
| Need Windows Enterprise licensing | Yes — included in E3, not in Business plans |
Frequently Asked Questions
Do we need E3 if we're under 300 users?
Not necessarily — Business Premium covers similar day-to-day security needs at a lower cost for organizations under the 300-user cap.
What's the main reason businesses move to E3?
Usually either exceeding the 300-user cap on Business plans, or needing advanced compliance and eDiscovery capabilities that Business plans don't include.
Is E3 a step toward E5?
For some organizations, yes — E3 covers standard enterprise needs, with E5 as a further upgrade for advanced security and analytics if specifically needed.
Can we license only some employees on E3?
Yes, licenses can be mixed per user, so only the roles that need E3's capabilities are licensed for it.
Related Guides
Conclusion
E3 is worth it when you've hit the 300-user cap on Business plans, or when you have a genuine need for advanced compliance and eDiscovery tooling. Outside those two situations, Business Premium usually delivers comparable day-to-day value at a lower price.
Rua Technologies can review your specific user count and compliance requirements and give you a straight answer, rather than defaulting to the higher tier.
