Enterprise Plans — E1, E3, and E5 Compared
Enterprise "E" plans are designed for organisations with over 300 users or complex requirements. The three tiers — E1, E3, and E5 — represent dramatically different feature sets and cost points. Understanding the precise differences is essential for role-based assignment and cost optimisation.
| Capability | E1 (~$10/user/mo) | E3 (~$36/user/mo) | E5 (~$57/user/mo) |
|---|---|---|---|
| Office apps | Web and mobile only | Full desktop apps (5 devices per user) | Full desktop apps (5 devices per user) |
| Exchange mailbox | 50 GB | 100 GB + unlimited archive | 100 GB + unlimited archive |
| OneDrive storage | 1 TB | 1 TB (expandable) | 1 TB (expandable) |
| Teams | Full | Full | Full + Phone System + Audio Conferencing |
| Identity & access | Basic Azure AD | Azure AD Premium P1 + Intune | Azure AD Premium P2 + PIM + Identity Protection |
| Threat protection | Exchange Online Protection only | EOP + basic DLP | Full Defender suite (Endpoint, O365 P2, Identity, Cloud App Security) |
| Compliance | Basic | Legal hold, basic eDiscovery | Advanced eDiscovery, Audit, Records Mgmt, Insider Risk |
| Analytics | None | None | Power BI Pro included |
| Windows Enterprise | Not included | Included (upgrade rights) | Included (upgrade rights) |
| Best for | Light users — email, Teams, web Office | Standard knowledge workers — majority of enterprise | Regulated industries, security-intensive, telephony needs |
"E5 is not a compliance strategy — it is a feature bundle. If only 20 % of your users need advanced security and compliance features, assigning E5 to the entire organisation wastes $21/user/month on the remaining 80 %. The savings from targeted E5 assignment can fund the features you actually need through add-ons."
Frontline Worker Plans — F1 and F3
Frontline "F" plans target non-desk workers — retail staff, factory workers, nurses, drivers, field technicians — who primarily need communication and basic access rather than full productivity tools. In enterprises with large frontline populations, F plans are the single most impactful cost optimisation lever.
Microsoft 365 F1
The lightest enterprise licence. Provides: Teams (chat, meetings, limited channels), SharePoint intranet access, Viva Engage (company communications), and web-based viewing only of Office files. Exchange Online Kiosk mailbox (2 GB, Outlook web only — no desktop client). OneDrive limited to 2 GB. No Office apps — not even web editing. F1 is for employees who need to receive communications, view schedules, access company news, and participate in Teams chat — but do not create documents or send significant email. Ideal for shift workers on shared devices or personal mobile.
Microsoft 365 F3
Significant step up: includes web and mobile Office apps (Word, Excel, PowerPoint — no desktop installation), 2 GB mailbox with Outlook mobile, 2 GB OneDrive, Teams, and SharePoint. Critically, F3 includes Windows Enterprise E3 licence and basic device management (Intune) — ideal for shared workstation and company-issued tablet scenarios. Also includes Microsoft Defender endpoint protection optimised for lightweight/shared devices. F3 suits frontline workers who need to create and edit documents on mobile or web, participate in data entry, and use company-managed devices — without requiring full desktop Office or large mailboxes.
The F-Plan Savings Multiplier
Assigning F3 ($8) instead of E3 ($36) to 10,000 frontline workers saves $280,000 per month — $3.36 million per year. Assigning F1 ($2.25) instead of E3 saves $4.05 million per year for the same population. In enterprises with large operational workforces (retail, manufacturing, healthcare, logistics), frontline plan optimisation is typically the single largest Microsoft licensing cost reduction opportunity. The key is accurately classifying which employees genuinely need E-plan capabilities versus those who can operate effectively within F-plan constraints.
Business Plans — The 300-User Option
Microsoft 365 Business plans (Basic, Standard, Premium) are capped at 300 users per plan — designed for SMBs but occasionally relevant for enterprise subsidiaries, pilot groups, or smaller divisions.
| Business Plan | Price/User/Mo | Office Apps | Security Level | Enterprise Equivalent |
|---|---|---|---|---|
| Business Basic | $6 | Web and mobile only | Basic | Similar to E1 (lower price, 300-cap) |
| Business Standard | $12.50 | Full desktop apps | Basic | Office 365 E3 features without EMS security |
| Business Premium | $22 | Full desktop apps | Azure AD P1, Intune, Defender for Business | Approx. E3 + partial E5 Security — at $14 less |
| Enterprise comparison | Business Premium ($22) delivers E3-equivalent productivity + partial E5 security — $14/user/month cheaper than E3 ($36). For subsidiaries under 300 users, this can represent significant savings. | |||
Add-On Strategy — Build vs Buy the Bundle
Microsoft offers individual add-ons that can be layered onto lower-tier plans, creating a "build your own E5" approach. This is often more cost-effective than blanket E5 assignment when only a subset of E5 features is needed.
Microsoft Copilot ($30/user/mo)
AI assistant across M365 apps. Requires E3 or E5 base licence. At $30/user/month, Copilot adds 83 % to an E3 licence or 53 % to E5. CIO guidance: do not blanket-deploy Copilot. Pilot with 5–10 % of users (knowledge workers, executives, content creators) and measure ROI before expanding. A 20,000-user org deploying Copilot to 2,000 users (vs all 20,000) saves $6.48 million/year. Negotiate Copilot pricing as a separate line item in your EA — volume discounts and pilot-to-expansion rights are achievable.
Microsoft Defender Suite (varies)
Individual Defender products (Endpoint P2, O365 P2, Identity, Cloud App Security) can be purchased as add-ons to E3 rather than upgrading the entire user base to E5. For example, if only 3,000 of 15,000 users need advanced threat protection, adding Defender for Endpoint P2 to 3,000 E3 users is cheaper than upgrading all 15,000 to E5. Calculate: (3,000 × Defender add-on cost) vs (15,000 × $21 E3-to-E5 uplift).
Power BI Pro ($10/user/mo)
Included in E5 but available as an add-on to E3. If only 1,000 of 10,000 users need Power BI, adding it to those 1,000 E3 users ($10K/month) is dramatically cheaper than upgrading all 10,000 to E5 ($210K/month additional). Power BI Pro add-on is one of the clearest cases where targeted add-ons beat blanket upgrades.
Teams Phone ($8–$15/user/mo)
Phone System and Calling Plans are included in E5 but available as add-ons to E3. If only 5,000 of 20,000 users need telephony, adding Teams Phone to E3 users is significantly cheaper than E5 for all. Also evaluate Direct Routing or Operator Connect as alternatives to Microsoft Calling Plans for potential further savings on voice minutes.
Role-Based Plan Assignment — The Optimisation Framework
The most powerful Microsoft 365 cost optimisation strategy is assigning plans by role rather than by organisation. Microsoft supports mix-and-match licensing within the same tenant — there is no requirement for every user to be on the same plan.
| User Segment | Recommended Plan | Price/User/Mo | Key Capabilities Matched |
|---|---|---|---|
| Executives & senior leadership | E5 + Copilot | $87 | Full security, analytics, telephony, AI assistance |
| IT, security, compliance | E5 | $57 | Full Defender suite, eDiscovery, audit, PIM |
| Knowledge workers (standard) | E3 | $36 | Desktop apps, 100 GB mail, Intune, Azure AD P1 |
| Light users (email/Teams only) | E1 | $10 | Web Office, Teams, email — no desktop apps |
| Frontline — data entry, tablets | F3 | $8 | Web/mobile Office, Teams, Windows Enterprise |
| Frontline — communication only | F1 | $2.25 | Teams chat, SharePoint view, schedule access |
| Blended cost example (20,000 users) | 500 E5 + 1,000 E5+Copilot + 8,500 E3 + 2,000 E1 + 5,000 F3 + 3,000 F1 = ~$23/user blended vs $36 flat E3 = $3.1M/year savings | ||
Cost Optimisation Tactics for EA Negotiations
Resist Blanket E5 Pressure
Microsoft's sales team is incentivised to drive E5 adoption across your entire organisation. The pitch: "E5 includes everything — it's simpler." The reality: for a 20,000-user organisation, blanket E5 ($57) vs optimised mix ($23 blended) costs an additional $8.16 million per year. Counter with data: present your role-based analysis showing exactly which users need E5 features and which do not. "We need E5 for 1,500 users in security, compliance, and executive roles — the remaining 18,500 are appropriately served by E3 and F plans."
Negotiate Plan-Specific Discounts
Microsoft's EA discount structures allow different discount levels per SKU. Negotiate E3, E5, and F-plan discounts as separate line items rather than accepting a single blended discount. Larger E3 volumes should command deeper discounts (this is your highest-volume SKU). F-plan volumes, while lower per-user cost, still represent significant total spend across large frontline populations — negotiate volume discounts for F3 and F1 separately. E5 discounts should reflect the premium nature of the product — Microsoft has more margin flexibility on E5 than E3.
Secure Copilot Pilot-to-Expansion Rights
Do not commit to full Copilot deployment at EA renewal. Instead, negotiate pilot terms: a defined number of Copilot licences (5–10 % of E3/E5 users) at a negotiated rate, with contractual rights to expand at the same rate if the pilot demonstrates measurable ROI. This protects against Copilot price increases during the EA term and gives you data-driven expansion authority without upfront overcommitment.
Include Step-Up and Step-Down Rights
Negotiate the ability to move users between plans during the EA term without penalty. If you initially assign 2,000 users to E5 but discover that 500 of them only need E3, you should be able to step-down those 500 users at the next anniversary. Similarly, if a regulatory change requires more users on E5, step-up rights at the negotiated rate protect you from list-price purchases mid-term. This flexibility is critical because role requirements evolve — the plan mix you define at EA signing will not be the plan mix you need in Year 3.
✅ CIO Recommendations — Microsoft 365 Plan Selection
- Classify your workforce by role: Map every user segment to a plan tier based on actual feature requirements — not organisational default or "what they had before"
- Default to E3, not E5: E3 covers the needs of 70–80 % of knowledge workers. Upgrade to E5 only where advanced security, compliance, telephony, or analytics are genuinely required
- Deploy F-plans aggressively for frontline: Every user moved from E3 to F3 saves $28/month; from E3 to F1 saves $33.75/month. For large frontline populations, this is your biggest savings lever
- Use add-ons instead of blanket upgrades: Defender, Power BI, Teams Phone, and Copilot are all available as add-ons to E3 — assign them only to users who need them
- Pilot Copilot before committing: At $30/user/month, Copilot is too expensive for blanket deployment without proven ROI. Start with 5–10 % of users, measure productivity impact, then decide
- Negotiate plan-specific discounts in your EA: Different discount levels per SKU (E1, E3, E5, F1, F3) optimise your blended cost more effectively than a single discount rate
- Include step-up/step-down flexibility: Your plan mix will change during the EA term — ensure you can adjust without penalty
- Engage independent advisory: Microsoft's sales team is incentivised to sell E5 and Copilot. Independent advisors provide unbiased analysis, benchmark data, and negotiation support that consistently reduces total Microsoft spend by 20–35 %
Industry-Specific Plan Selection Guidance
Healthcare
Healthcare organisations typically have a 60–70 % frontline workforce (nurses, technicians, support staff) who are ideal candidates for F1 or F3 plans. Clinical staff who use shared workstations for charting and scheduling fit the F3 profile — web/mobile Office, Teams, and Windows Enterprise on managed devices. Administrative and billing staff need E3 for full desktop apps and Exchange. Compliance teams (HIPAA officers, legal) may require E5 for advanced eDiscovery, Audit, and Insider Risk management. Typical optimised mix: 15 % E5, 25 % E3, 10 % F3, 50 % F1 — delivering a blended cost approximately 55 % below blanket E3.
Manufacturing
Manufacturing enterprises have the largest frontline populations — production floor workers, logistics staff, quality inspectors, warehouse operators — who rarely need desktop Office or large mailboxes. F1 is appropriate for workers who need only Teams communication, shift schedules, and company news. F3 for supervisors and quality inspectors who need data entry and document editing on tablets. Engineering and design teams need E3 or E5 depending on IP protection requirements. Typical optimised mix: 5 % E5, 15 % E3, 20 % F3, 60 % F1 — potentially reducing Microsoft licensing costs by 60–70 % compared to a flat E3 assignment.
Financial Services
Regulated financial institutions face the highest security and compliance requirements, which tilts the mix toward E5 for a larger percentage of users than other industries. Traders, advisors, compliance officers, and IT security teams need the full Defender suite, Azure AD P2 for PIM, and advanced Purview compliance tools — all E5. General banking staff and relationship managers typically need E3. Branch staff and call centre agents can operate on F3 (web Office, Teams, managed devices). Typical optimised mix: 30 % E5, 40 % E3, 15 % F3, 15 % F1 — still delivering 20–30 % savings versus blanket E5 while maintaining regulatory compliance across all user segments.
Retail
Retail organisations often have the most dramatic frontline-to-corporate ratio — 80–90 % of employees work in stores, distribution centres, or customer service. Store associates need F1 at most (Teams for shift communication, schedule access). Store managers and regional leaders need F3 or E3 depending on reporting requirements. Corporate merchandising, marketing, and finance teams need E3. Security and executive leadership may need E5. Typical optimised mix: 3 % E5, 10 % E3, 7 % F3, 80 % F1 — delivering a blended cost of approximately $5–$7/user/month versus $36 for flat E3, representing savings of 80 %+ for a 50,000-employee retailer.