Side-by-Side: Microsoft 365 E3 vs E5
Complete enterprise comparison: pricing, security, compliance, telephony, analytics, and ROI analysis for 2026.
Microsoft 365 E3 vs E5 Enterprise Comparison 2026 is a frequent enterprise comparison question. EPC Group helps Fortune 500 organizations evaluate platforms, score against compliance and total cost of ownership requirements, and select the right Microsoft-ecosystem fit. 29 years of Microsoft enterprise consulting experience.
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Microsoft 365 E3 vs E5: Which License Does Your Enterprise Need?
What is the difference between Microsoft 365 E3 and E5?
Microsoft 365 E3 ($36/user/month) offers essential enterprise productivity and security features. This includes:
- Office apps
- Exchange
- SharePoint
- Teams
- Entra ID P1
- Intune
- Basic threat protection
In contrast, Microsoft 365 E5 ($57/user/month) includes all E3 features plus:
- Advanced security (Defender for Endpoint P2, Cloud App Security, Entra ID P2)
- Advanced compliance (eDiscovery Premium, Insider Risk Management, Communication Compliance)
- Power BI Pro
- Phone System
The $21/user/month difference provides enterprise SOC capabilities, automates regulatory compliance, and includes built-in business intelligence. This replaces $30-$50/user/month in third-party tools for many organizations.
The decision between Microsoft 365 E3 and E5 licensing is crucial for any enterprise. With over 430 million commercial Microsoft 365 users worldwide, this choice affects your:
- Security posture
- Compliance readiness
- Operational costs
- Ability to use new features like Microsoft Copilot
Many organizations focus only on the sticker price. They often ignore the total cost of ownership, which shows that E5 is the more economical option for regulated enterprises.
This guide provides the comprehensive E3 vs E5 comparison that enterprise IT leaders need — covering every feature difference, real pricing scenarios, security and compliance gap analysis, and a clear decision framework based on 29 years of deploying Microsoft 365 across Fortune 500 organizations.
Whether you are evaluating a new Microsoft 365 deployment, considering an E3-to-E5 upgrade, or optimizing a hybrid licensing strategy, this comparison will help you make a data-driven decision aligned with your organization's security, compliance, and budget requirements. For personalized guidance, contact our Microsoft 365 consulting team.
Quick Comparison: E3 vs E5 at a Glance
The following table summarizes every major capability difference between Microsoft 365 E3 and E5 enterprise licenses as of 2026.
| Feature Category | E3 ($36/user/mo) | E5 ($57/user/mo) |
|---|---|---|
| Office Desktop Apps | Included | Included |
| Exchange Online | Plan 2 (100 GB) | Plan 2 (100 GB) |
| SharePoint Online | Plan 2 | Plan 2 |
| Microsoft Teams | Full | Full + Phone System |
| Windows 11 Enterprise | E3 | E5 |
| Entra ID (Azure AD) | P1 | P2 (PIM, Identity Protection) |
| Microsoft Intune | Plan 1 | Plan 1 |
| Defender for Office 365 | Plan 1 | Plan 2 (auto-remediation) |
| Defender for Endpoint | Plan 1 | Plan 2 (EDR, AIR) |
| Defender for Cloud Apps | Not included | Included (CASB) |
| Defender for Identity | Not included | Included |
| eDiscovery | Standard | Premium (predictive coding) |
| Insider Risk Management | Not included | Included |
| Communication Compliance | Not included | Included |
| Information Barriers | Not included | Included |
| Advanced Audit | Not included | Included (10-year retention) |
| Power BI Pro | Not included | Included ($10/user value) |
| Viva Insights (Advanced) | Not included | Included |
| Phone System | Not included | Included (cloud PBX) |
| Audio Conferencing | Not included | Included |
| Customer Lockbox | Not included | Included |
| Auto-labeling (Sensitivity) | Not included | Included |
Pricing Analysis: E3 vs E5 Total Cost of Ownership
The basic price comparison of $36 versus $57 per user per month does not show the complete picture. Enterprise organizations using E3 often add $15 to $40 per user per month for extra security, compliance, and productivity features. In contrast, these features come included with E5.
When you consider the third-party tools that E5 replaces, the actual cost difference becomes much smaller or may even flip in favor of E5.
Microsoft 365 E3 costs $36/user/month, which equals $432/user/year. For organizations with 2,500+ users, Enterprise Agreements can reduce this to about $30-$33/user/month.
Microsoft 365 E5 costs $57 per user per month, which totals $684 per user per year. For large enterprises, EA pricing typically ranges from $48 to $53 per user per month. The $21 per user per month premium, amounting to $252 per user per year, is a significant concern for many IT leaders.
However, it is crucial to consider what this $21 premium replaces:
- Enhanced security features
- Advanced compliance tools
- Additional analytics capabilities
Annual Cost Comparison by Organization Size
| Scenario | 500 Users | 2,500 Users | 10,000 Users | 25,000 Users |
|---|---|---|---|---|
| E3 Annual Cost | $216,000 | $1,080,000 | $4,320,000 | $10,800,000 |
| E5 Annual Cost | $342,000 | $1,710,000 | $6,840,000 | $17,100,000 |
| E5 Premium (Difference) | $126,000 | $630,000 | $2,520,000 | $6,300,000 |
| Typical E3 Add-on Costs* | $108,000 | $540,000 | $2,160,000 | $5,400,000 |
| E3 + Add-ons Total | $324,000 | $1,620,000 | $6,480,000 | $16,200,000 |
| Net E5 Savings (vs E3+Add-ons) | -$18,000 | -$90,000 | -$360,000 | -$900,000 |
*Typical E3 add-on costs assume: Defender for Endpoint P2 ($5.20/user/mo), eDiscovery Premium ($6/user/mo), Power BI Pro ($10/user/mo) for 25% of users, and Phone System ($8/user/mo) for 30% of users. Actual costs vary by organization.
Organizations that require three or more E5-exclusive features often save money by upgrading to E5 instead of buying individual add-ons for E3. For a 10,000-user organization, the average annual savings of E5 compared to E3 plus equivalent add-ons is $360,000. This estimate does not include the operational savings from managing one license SKU instead of several add-on subscriptions.
Security Feature Differences: E3 vs E5
Security is the main reason for upgrading from E3 to E5. E3 offers a strong security foundation, including:
- Entra ID P1 with Conditional Access
- Intune MDM
- Defender for Office 365 Plan 1
- Data Loss Prevention
In contrast, E5 provides the complete Microsoft security stack needed by most enterprise security operations centers. This includes:
- Extended detection and response (XDR)
- Cloud access security broker (CASB)
- Identity protection with risk-based policies
- Automated incident investigation
The distinction is crucial when you note that 68% of enterprise breaches in 2025 involved identity compromise or email-based attacks. These are the areas where E5's advanced Defender and Entra ID P2 capabilities offer superior defense compared to E3.
Organizations that use E3 for security often add tools like CrowdStrike or Palo Alto. These tools typically cost between $12 and $25 per user per month. In contrast, E5 provides similar protection natively within the Microsoft ecosystem.
| Security Capability | E3 | E5 | Why It Matters |
|---|---|---|---|
| Entra ID | P1 | P2 | P2 adds Privileged Identity Management (just-in-time admin access), Identity Protection (risk-based sign-in policies), and access reviews |
| Conditional Access | Standard | Risk-based | E5 enables risk-based policies that adapt MFA requirements based on real-time sign-in risk scoring |
| Defender for Office 365 | Plan 1 | Plan 2 | Plan 2 adds automated investigation and response (AIR), attack simulation training, and threat explorer |
| Defender for Endpoint | Plan 1 | Plan 2 | Plan 2 adds endpoint detection and response (EDR), automated investigation, and advanced hunting |
| Defender for Cloud Apps | Not included | Full CASB | Discovers shadow IT (avg. enterprise has 1,000+ unauthorized cloud apps) and applies real-time session controls |
| Defender for Identity | Not included | Included | Monitors on-premises Active Directory for lateral movement, pass-the-hash, and credential theft attacks |
| Microsoft Sentinel integration | Basic | Native XDR | E5 Defender suite feeds directly into Sentinel SIEM with pre-built detection rules and automated playbooks |
| Attack Simulation Training | Not included | Included | Simulated phishing campaigns to train employees, reducing successful phishing by 50-70% |
For organizations considering Microsoft Copilot deployment, E5 security features become even more critical. Copilot surfaces data based on user permissions, which means overshared SharePoint sites and Teams channels expose sensitive information through natural language queries. E5's Defender for Cloud Apps, sensitivity labels with auto-classification, and Information Barriers prevent Copilot from becoming a data leakage vector. Read our Copilot deployment guide for details on governance prerequisites.
Compliance & eDiscovery: E3 vs E5
Compliance is the second most common reason for upgrading to E5. This is particularly true in healthcare, financial services, legal, and government sectors. E3 offers basic compliance features, including:
- Retention policies
- Basic DLP
- eDiscovery Standard
- Manual sensitivity labels
E5 enhances compliance by turning it from a manual task into an automated, AI-driven capability that adapts to organizational complexity.
The eDiscovery difference makes E5 a strong choice for organizations facing active litigation or regulatory reviews. E3's eDiscovery Standard offers basic case management and content search. In contrast, E5's eDiscovery Premium includes:
- Review sets with near-duplicate detection
- Predictive coding to prioritize relevant documents
- Conversation threading for Teams and email chains
- Custodian management with legal hold notifications
Law firms and corporate legal departments report saving 60-80% of their time when upgrading from Standard to Premium eDiscovery.
Insider Risk Management, available only in E5, is vital for organizations in hybrid work settings. This feature identifies data exfiltration patterns, such as employees downloading large amounts of data before leaving. It also detects policy violations and security issues from verified internal users.
When paired with Communication Compliance, which monitors regulatory breaches in Teams, email, and Copilot interactions, E5 offers the internal threat detection that regulated industries need.
| Compliance Feature | E3 | E5 |
|---|---|---|
| Data Loss Prevention (DLP) | Standard policies | Advanced with Endpoint DLP |
| Sensitivity Labels | Manual only | Auto-labeling (AI-driven) |
| Retention Policies | Included | Included + Advanced |
| eDiscovery | Standard | Premium (predictive coding) |
| Insider Risk Management | Not included | Included |
| Communication Compliance | Not included | Included |
| Information Barriers | Not included | Included |
| Customer Lockbox | Not included | Included |
| Advanced Audit | Not included | 10-year retention |
| Compliance Manager | Basic assessments | Full with auto-scoring |
For a deeper look at security and compliance configurations for Microsoft 365 enterprise deployments, see our Microsoft 365 security best practices guide.
Voice & Telephony: E5 Phone System Advantage
Microsoft 365 E5 includes Teams Phone System — a cloud PBX that replaces traditional on-premises phone systems with cloud-based calling, auto attendants, call queues, voicemail transcription, call recording, and call analytics. E3 does not include Phone System; it requires an $8/user/month add-on.
Organizations using on-premises PBX systems like Cisco, Avaya, or Mitel can save significantly with the E5 Phone System. A typical enterprise PBX costs between $20 and $40 per user each month. This includes expenses for hardware maintenance, carrier contracts, and administrative overhead.
Switching to the E5 Phone System removes the PBX cost completely. This savings can nearly offset the price difference between E3 and E5 plans.
E5 includes Audio Conferencing. This feature lets meeting participants dial in by phone when they cannot join Teams meetings online. It is crucial for organizations with:
- Field workers
- Manufacturing employees
- Clients without Teams installed
As an E3 add-on, Audio Conferencing costs $4 per user per month.
E3 Telephony Stack (Add-ons Required)
- Teams meetings (included)
- Phone System: +$8/user/mo
- Audio Conferencing: +$4/user/mo
- Calling Plan: +$8-$24/user/mo
- Total telephony add-on: $20-$36/user/mo
E5 Telephony Stack (Included)
- Teams meetings (included)
- Phone System (included)
- Audio Conferencing (included)
- Calling Plan: +$8-$24/user/mo (or Direct Routing)
- Total telephony add-on: $0-$24/user/mo
Analytics & Business Intelligence: E3 vs E5
Microsoft 365 E5 includes Power BI Pro for every licensed user. This is a $10/user/month value that offers full report creation, sharing, and collaboration features within the Power BI service.
E3 users only have access to Power BI Free. This limits them to viewing reports shared from Power BI Premium capacity, and they cannot create or share their own content.
For organizations that prioritize data-driven decision making, including Power BI Pro can significantly change costs. For example, a 10,000-user organization with 40% needing Power BI Pro would spend $48,000 per month, totaling $576,000 per year on add-on licenses with E3.
With E5, the cost for Power BI Pro becomes zero. All 10,000 users get Power BI Pro at no extra cost. Even if only 20% of users actively use Power BI, the savings total $240,000 each year.
E5 includes Viva Insights (advanced). This tool offers organizational analytics that help leaders understand:
- Collaboration patterns
- Meeting culture
- Focus time across the organization
These insights can identify burnout risks, meeting overload, and after-hours work patterns. HR and executive leadership teams increasingly demand these capabilities. The standalone Viva Insights add-on costs $6/user/month with E3.
Microsoft MyAnalytics (personal productivity insights) is included in both E3 and E5, but the organizational-level analytics dashboard, network analysis, and manager insights are E5-exclusive features that provide the leadership visibility enterprise organizations require.
Information Protection & Data Governance
Both E3 and E5 include Microsoft Purview Information Protection with sensitivity labels. However, their automation features are quite different.
E3 supports:
- Manually applied sensitivity labels
- Basic DLP policies
E5 enhances this with:
- Automatic sensitivity labeling powered by machine learning
- Automatic classification and protection of documents containing sensitive data, such as credit card numbers, Social Security numbers, and medical record numbers, without user intervention
This distinction is vital for large enterprises. An organization with millions of documents in SharePoint cannot rely on users to apply sensitivity labels manually. Auto-labeling ensures consistent classification across all documents. This consistency is important for:
- Maintaining data security
- Meeting compliance requirements
- Streamlining document management
- DLP policy enforcement
- Conditional Access decisions
- Copilot data governance
Organizations using Microsoft Copilot without auto-labeling risk data leakage. Natural language queries may reveal unclassified sensitive content.
E5 offers advanced Data Loss Prevention (DLP) features. These include:
- Endpoint DLP: Monitors copy, paste, print, and USB actions on Windows and macOS devices.
- Teams DLP: Protects chat messages.
- DLP alerts dashboard: Provides centralized monitoring for policy violations.
In contrast, E3 DLP is limited to Exchange Online and SharePoint/OneDrive policies. It does not cover endpoint or Teams actions.
When to Choose Microsoft 365 E3
E3 is the right choice when your organization meets specific criteria. It provides a comprehensive productivity and basic security foundation at a lower per-user cost, and the add-on model allows you to selectively purchase advanced capabilities only for the users who need them.
Non-regulated industries
Organizations not subject to HIPAA, SOC 2, FINRA, or FedRAMP that do not require advanced compliance automation
Under 500 users
Smaller organizations where the total E5 premium is significant and security can be managed with focused E3 add-ons
Existing security stack
Organizations with multi-year contracts on CrowdStrike, Palo Alto, or similar tools that cannot be displaced yet
Budget-constrained
Organizations with strict per-user budget caps where $36/user is approved but $57/user exceeds authorization
Limited compliance needs
Organizations with basic retention and DLP requirements that eDiscovery Standard adequately addresses
No telephony migration
Organizations satisfied with existing PBX systems and not planning a Teams Phone migration in the near term
When to Choose Microsoft 365 E5
E5 is the superior choice for organizations where security, compliance, and advanced analytics are not optional extras but core business requirements. The total cost of ownership analysis typically favors E5 when three or more advanced capabilities are needed.
Regulated industries
Healthcare (HIPAA), financial services (SOC 2, FINRA), government (FedRAMP), and legal organizations
Copilot deployment
Organizations deploying Microsoft Copilot that need data governance guardrails — auto-labeling, information barriers, and DLP
Active litigation
Organizations with ongoing legal matters requiring eDiscovery Premium, legal hold, and predictive coding capabilities
PBX replacement
Organizations replacing on-premises phone systems with Teams Phone, eliminating $20-$40/user/month PBX costs
Data-driven culture
Organizations where 30%+ of users need Power BI Pro for report creation and self-service analytics
Insider threat concern
Organizations requiring Insider Risk Management for data exfiltration detection and communication monitoring
Hybrid Licensing Strategy: Mix E3 and E5 for Optimal ROI
Many enterprises find that a hybrid E3/E5 licensing strategy is the most cost-effective option. Microsoft supports mixed licensing within a single tenant. This allows organizations to assign E5 licenses to users who need advanced features while keeping most users on E3. EPC Group uses this model in over 60% of our Microsoft 365 enterprise engagements.
A well-designed hybrid strategy targets E5 licenses at the roles with the highest security, compliance, or analytics requirements while maintaining organizational-wide protection through tenant-level E5 features that benefit all users regardless of individual license assignment.
Recommended E5 License Allocation
| User Group | License | Justification | Typical % |
|---|---|---|---|
| IT Security & SOC Analysts | E5 | Need Defender XDR, Cloud App Security, and advanced hunting | 3-5% |
| Compliance & Legal Teams | E5 | eDiscovery Premium, Insider Risk, Communication Compliance | 2-5% |
| Executives (C-Suite, VPs) | E5 | High-value targets for identity attacks; need PIM and Identity Protection | 3-5% |
| Data Analysts & BI Teams | E5 | Power BI Pro included; Viva Insights for organizational analytics | 5-10% |
| Customer-Facing Sales/Support | E5 | Phone System for Teams calling; Audio Conferencing for client meetings | 5-15% |
| General Knowledge Workers | E3 | Core productivity, basic security, standard compliance — sufficient | 60-80% |
Hybrid Cost Scenario: 5,000-User Organization
| Approach | Monthly Cost | Annual Cost | Annual Savings |
|---|---|---|---|
| All E3 ($36 x 5,000) | $180,000 | $2,160,000 | — |
| All E5 ($57 x 5,000) | $285,000 | $3,420,000 | — |
| Hybrid: 25% E5 + 75% E3 | $206,250 | $2,475,000 | $945,000 vs all-E5 |
| E3 + Equivalent Add-ons | $262,500 | $3,150,000 | — |
The hybrid model provides $945,000 in annual savings compared to a full E5 deployment. It ensures that users who require advanced security, compliance, and analytics still receive these capabilities.
This approach results in a 27.6% cost reduction compared to the all-E5 method. It offers minimal trade-offs in security or compliance when license allocation is managed by skilled Microsoft licensing consultants.
ROI Analysis: Quantifying the E5 Investment
Beyond licensing cost comparisons, the E5 ROI calculation must account for the third-party tools it replaces, the operational efficiency gains, and the risk reduction value. Based on EPC Group's deployments across Fortune 500 organizations, here is the quantified ROI framework.
Third-party security tool displacement
CrowdStrike, Palo Alto, Proofpoint, or Zscaler licenses replaced by native Defender suite
Third-party compliance tool displacement
Relativity, Veritas, or separate eDiscovery/DLP platforms replaced by Purview
Power BI Pro license savings
Included in E5 for all users, eliminating per-user add-on cost
PBX cost elimination
On-premises phone system hardware, maintenance, and carrier costs replaced by Teams Phone
Admin overhead reduction
Single management console instead of 5-8 separate security and compliance platforms
Incident response time reduction
Unified XDR with automated investigation vs manual correlation across multiple tools
When summed, the total displaced cost for a typical regulated enterprise ranges from $40-$80/user/month — exceeding the $57/user/month E5 list price. This means E5 is not just cheaper than E3-plus-add-ons; it is often cheaper than the disparate tool stack organizations already pay for today. The challenge is demonstrating this to CFOs and procurement teams, which requires a detailed tool-displacement analysis that EPC Group provides as part of every Microsoft 365 consulting engagement.
Migration from E3 to E5: Implementation Roadmap
Upgrading from E3 to E5 is a license-level change within the same Microsoft 365 tenant. This process requires no data migration, no mailbox moves, and no user disruption. However, if you reassign licenses without activating and configuring the new E5 features, you will pay for E5 but only use E3 capabilities.
A structured enablement roadmap helps your organization achieve the full value of E5 from day one. This roadmap includes:
- Activation of new E5 features
- Configuration tailored to your needs
- Training for users to maximize benefits
Phase 1: License Assignment & Security (Week 1-2)
- Reassign E5 licenses to target users via Microsoft 365 admin center or PowerShell
- Deploy Microsoft Defender for Endpoint Plan 2 to all managed devices
- Configure Entra ID P2: enable Identity Protection policies and Privileged Identity Management
- Upgrade Conditional Access policies to use risk-based sign-in and user risk levels
- Enable Defender for Cloud Apps: connect cloud apps and configure session policies
Phase 2: Compliance Enablement (Week 3-4)
- Configure eDiscovery Premium: create review sets, enable custodian management
- Deploy Insider Risk Management: define HR connector, set policy thresholds
- Enable Communication Compliance: configure Teams, email, and Copilot monitoring policies
- Set up Information Barriers for regulated data separation (e.g., investment banking / advisory walls)
- Configure Customer Lockbox and Advanced Audit with 10-year retention
Phase 3: Analytics & Telephony (Week 5-6)
- Activate Power BI Pro for all E5 users; migrate from Power BI Free workspaces
- Configure Viva Insights organizational analytics and manager dashboards
- Deploy Teams Phone System: configure auto attendants, call queues, and voicemail
- Set up PSTN connectivity via Calling Plans, Operator Connect, or Direct Routing
- Enable Audio Conferencing and configure toll-free dial-in numbers
Phase 4: Optimization & Training (Week 7-8)
- Run security posture assessment using Microsoft Secure Score (target: 80%+)
- Conduct compliance posture review using Compliance Manager (target: 80%+)
- Deploy sensitivity label auto-labeling policies and validate accuracy
- Train IT admins on Defender XDR console, eDiscovery Premium, and Insider Risk
- Document runbooks for incident response, legal hold, and compliance investigation workflows
EPC Group shortens the typical 8-week roadmap to just 4-6 weeks for most organizations. We achieve this with our proven E3-to-E5 migration accelerator.
Our fixed-fee engagement covers:
- License planning
- Security deployment
- Compliance configuration
- Telephony setup
- Admin training
This approach ensures your team can maximize E5 capabilities right away, rather than waiting months to discover new features after the license change.
Frequently Asked Questions: Microsoft 365 E3 vs E5
What is the difference between Microsoft 365 E3 and E5?
Microsoft 365 E3 ($36/user/month) includes Office apps, Exchange Online, SharePoint, Teams, basic security (Entra ID P1, Intune, Defender for Office 365 Plan 1), and standard compliance (eDiscovery Standard, DLP, retention policies). Microsoft 365 E5 ($57/user/month) adds advanced security (Entra ID P2, Defender for Office 365 Plan 2, Microsoft Defender for Endpoint Plan 2, Cloud App Security), advanced compliance (eDiscovery Premium, Insider Risk Management, Communication Compliance, Information Barriers), Power BI Pro, Phone System, and Audio Conferencing. The $21/user/month premium delivers significantly enhanced threat protection, compliance automation, and built-in analytics.
Is Microsoft 365 E5 worth the extra cost?
For regulated enterprises, E5 almost always delivers positive ROI. The advanced security features (Defender for Endpoint P2, Cloud App Security, Entra ID P2) replace third-party security tools costing $15-$25/user/month. Power BI Pro alone costs $10/user/month as an add-on. Phone System replaces PBX costs of $20-$40/user/month. When you factor in the compliance features that eliminate separate GRC tool licenses ($8-$15/user/month), E5 typically saves $10-$30/user/month compared to E3 plus equivalent add-ons. EPC Group helps organizations model the exact ROI based on their current tool stack.
How much does Microsoft 365 E3 cost per user?
Microsoft 365 E3 costs $36/user/month with an annual commitment. Volume licensing through Enterprise Agreements (EA) can reduce this to approximately $30-$33/user/month for organizations with 2,500+ users. The price includes Office desktop apps (Word, Excel, PowerPoint, Outlook), Exchange Online Plan 2, SharePoint Online Plan 2, Microsoft Teams, Windows 11 Enterprise E3, Intune Plan 1, Entra ID P1, and standard compliance features. Additional costs may apply for add-ons like Power BI Pro ($10/user/month), Phone System ($8/user/month), or advanced compliance ($12/user/month).
How much does Microsoft 365 E5 cost per user?
Microsoft 365 E5 costs $57/user/month with an annual commitment. Enterprise Agreement pricing for large organizations (5,000+ users) typically ranges from $48-$53/user/month. E5 includes everything in E3 plus: Microsoft Defender for Endpoint Plan 2, Defender for Office 365 Plan 2, Microsoft Defender for Cloud Apps, Entra ID P2, Power BI Pro, Phone System, Audio Conferencing, eDiscovery Premium, Insider Risk Management, Communication Compliance, Information Barriers, and advanced Information Protection with auto-labeling.
Can I mix E3 and E5 licenses in my organization?
Yes, Microsoft allows mixed E3 and E5 licensing within the same tenant. This is a common and recommended strategy. A typical approach is E5 for security operations teams, compliance officers, executives handling sensitive data, and legal teams requiring eDiscovery Premium — then E3 for general knowledge workers. EPC Group typically sees organizations deploy 20-30% E5 and 70-80% E3, saving 40-50% compared to full E5 deployment while maintaining compliance coverage where it matters most.
What security features does E5 have that E3 does not?
E5 adds several critical security capabilities beyond E3: Microsoft Defender for Endpoint Plan 2 (advanced endpoint detection and response with automated investigation), Defender for Office 365 Plan 2 (automated threat remediation and attack simulation), Microsoft Defender for Cloud Apps (CASB for shadow IT discovery and app governance), Entra ID P2 (Privileged Identity Management and Identity Protection with risk-based conditional access), and Microsoft Defender for Identity (on-premises Active Directory threat detection). These features provide the security operations center (SOC) capabilities that E3 organizations must purchase separately.
Does Microsoft 365 E5 include Power BI Pro?
Yes, Microsoft 365 E5 includes Power BI Pro at no additional cost. With E3, Power BI Pro requires a separate $10/user/month add-on license. E5 also includes Viva Insights (advanced), which provides organizational analytics. For organizations where 50%+ of users need Power BI, the Power BI inclusion alone justifies a significant portion of the E3-to-E5 upgrade cost. Note: Power BI Premium per capacity is still a separate purchase regardless of E3 or E5 licensing.
What compliance features are only in E5?
E5-exclusive compliance features include: eDiscovery Premium (advanced case management, review sets, predictive coding), Insider Risk Management (detecting data theft, policy violations, and security anomalies from internal users), Communication Compliance (monitoring Teams, email, and Copilot interactions for regulatory violations), Information Barriers (preventing unauthorized communication between departments), Customer Lockbox (requiring Microsoft to get approval before accessing your data), and advanced auto-labeling for sensitivity labels. These are essential for HIPAA, SOC 2, FINRA, and FedRAMP compliance frameworks.
Does Microsoft 365 E5 include a phone system?
Yes, E5 includes Microsoft Teams Phone System, which provides cloud PBX capabilities: auto attendants, call queues, voicemail, call transfer, and call parking. However, you still need a PSTN connectivity option to make and receive external calls — either Microsoft Calling Plans ($8-$24/user/month depending on domestic/international), Operator Connect (through a certified telecom carrier), or Direct Routing (connecting your existing SBC infrastructure). E3 does not include Phone System, which costs $8/user/month as an add-on.
Should I upgrade from E3 to E5 or buy E3 add-ons?
The break-even point is typically 3-4 add-ons. If you need advanced security (Defender Suite), compliance (eDiscovery Premium), and either Power BI Pro or Phone System, upgrading to E5 is almost always cheaper than purchasing E3 plus individual add-ons. The add-on approach makes sense only when you need one specific capability for a small user group. EPC Group recommends E5 when: you operate in regulated industries, you are deploying Copilot (which requires strong data governance), or you currently spend $15+/user/month on third-party security and compliance tools.
What is the best Microsoft 365 license for HIPAA compliance?
HIPAA-regulated organizations should deploy Microsoft 365 E5 for users handling Protected Health Information (PHI). E5 provides the required controls: sensitivity labels with auto-classification for PHI, DLP policies that prevent PHI leakage across email and Teams, eDiscovery Premium for HIPAA breach investigations, Insider Risk Management to detect unauthorized PHI access, Communication Compliance for monitoring PHI discussions, and audit log retention (10 years with E5 add-on). E3 covers basic HIPAA requirements but leaves gaps in automated classification, insider threat detection, and advanced audit capabilities. EPC Group deploys HIPAA-compliant Microsoft 365 configurations for healthcare organizations nationwide.
How do I migrate from Microsoft 365 E3 to E5?
Migrating from E3 to E5 is a license-level change — no data migration is required since both plans operate in the same tenant. The process involves: license reassignment in the Microsoft 365 admin center, Conditional Access policy updates to leverage Entra ID P2, Defender for Endpoint deployment to all endpoints, eDiscovery Premium case configuration, Insider Risk Management policy creation, sensitivity label auto-labeling rules, and Phone System configuration if using telephony features. EPC Group recommends a phased rollout: security features first (Week 1-2), compliance features (Week 3-4), then analytics and telephony (Week 5-6). Most organizations complete the full E3-to-E5 transition in 4-8 weeks.
Need Help Choosing Between E3 and E5?
EPC Group provides complimentary Microsoft 365 license optimization assessments for enterprise organizations. Our analysis includes tool-displacement ROI modeling, hybrid licensing design, and a phased migration roadmap tailored to your security and compliance requirements.
Microsoft 365 E3 vs E5: Complete Enterprise Comparison 2026
Microsoft 365 E3 costs $36 per user per month. It includes the essential productivity and security tools. Microsoft 365 E5 costs $57 per user per month. This plan adds:
- Advanced security: Defender for Endpoint P2, Defender for Cloud Apps
- Compliance: Insider Risk, eDiscovery Premium
- Voice: Phone System
- Power BI Pro
The $21 difference is often justified in regulated enterprise environments.
- E3: $36/user/month. E5: $57/user/month. Difference: $21/user/month (2026 list pricing).
- E5 adds Microsoft Defender for Endpoint Plan 2, Defender for Cloud Apps, and Insider Risk Management — not available in E3.
- eDiscovery Premium (review sets, predictive coding) is E5-only — E3 includes only eDiscovery Standard.
- E5 Phone System replaces traditional PBX — no separate Microsoft Teams telephony add-on needed.
- EPC Group has completed license optimization assessments for 200+ enterprise M365 tenants across regulated industries.
E3 vs E5: Side-by-Side Comparison
| Feature | M365 E3 | M365 E5 |
|---|---|---|
| Price (2026 list) | $36/user/month | $57/user/month |
| Office apps (Word, Excel, PowerPoint, etc.) | Yes | Yes |
| Exchange Online, SharePoint, Teams, OneDrive | Yes | Yes |
| Entra ID P1 (Conditional Access, SSPR) | Yes | Yes |
| Microsoft Defender for Office 365 Plan 1 | Yes | Plan 2 (upgraded) |
| Intune device management | Yes | Yes |
| Basic audit log (90-day retention) | Yes | Yes (Premium: 10-year) |
| eDiscovery Standard | Yes | eDiscovery Premium (upgraded) |
| Entra ID P2 (PIM, Identity Protection) | No | Yes |
| Microsoft Defender for Endpoint Plan 2 | No | Yes |
| Microsoft Defender for Cloud Apps (CASB) | No | Yes |
| Microsoft Defender for Identity | No | Yes |
| Insider Risk Management | No | Yes |
| Communication Compliance | No | Yes |
| Customer Lockbox | No | Yes |
| Information Barriers | No | Yes |
| Phone System (PBX replacement) | No | Yes |
| Audio Conferencing | No | Yes |
| Power BI Pro | No | Yes |
| Microsoft Purview Information Protection P2 | No | Yes |
E3: What You Get
Microsoft 365 E3 is the standard enterprise license. It includes the complete M365 productivity suite, which features:
- Office apps
- Exchange Online
- SharePoint
- Teams
- OneDrive
The security offered is robust for most standard business environments.
E3 security includes:
- Entra ID P1: Conditional Access, multi-factor authentication, self-service password reset
- Microsoft Defender for Office 365 Plan 1: anti-phishing, safe attachments, safe links
- Microsoft Intune: mobile device management and app protection
- Microsoft Defender for Business (SMB-focused EDR, included in Business tiers)
- Basic DLP and sensitivity labels
E3 compliance includes eDiscovery Standard, 90-day audit log retention, and basic retention policies. For organizations without regulatory requirements, E3 provides a complete enterprise foundation.
E5: What You Add
Advanced Security
E5 adds a significantly deeper security stack:
- Microsoft Defender for Endpoint Plan 2: Advanced endpoint detection and response (EDR) with automated investigation and threat hunting.
- Microsoft Defender for Office 365 Plan 2: Automated threat remediation and attack simulation training.
- Microsoft Defender for Cloud Apps: Cloud Access Security Broker (CASB) for shadow IT discovery and app governance.
- Microsoft Defender for Identity: Detects threats in on-premises Active Directory.
- Entra ID P2: Privileged Identity Management (PIM) and risk-based Conditional Access with Identity Protection.
Advanced Compliance
E5 compliance capabilities go significantly beyond E3:
- eDiscovery Premium: Advanced case management, review sets, and predictive coding for large legal matters.
- Insider Risk Management: Detects data theft, policy violations, and security anomalies from internal users.
- Communication Compliance: Monitors Teams, email, and Copilot interactions for regulatory violations.
- Information Barriers: Prevents unauthorized communication between departments that must stay separate.
- Customer Lockbox: Requires your approval before Microsoft can access your data for support purposes.
- Audit (Premium): 10-year audit log retention and MailItemsAccessed events for breach investigation.
Voice and Analytics
- Phone System: Replaces traditional PBX — cloud-based call routing, voicemail, and auto-attendants in Teams.
- Audio Conferencing: Dial-in phone numbers for Teams meetings from any phone.
- Power BI Pro: Full Power BI service for all users, including report sharing and collaboration.
The $21 Cost Difference: When It Pays Off
The E5 premium costs $21 per user, per month, above the E3 plan. If you purchase the E5-exclusive features individually as E3 add-ons, it will cost about $35 per user, per month. Therefore, E5 is usually the more cost-effective choice if you need more than two add-ons.
E5 pays off immediately in these scenarios:
- You need Insider Risk Management for a regulated industry or departing employee risk
- You need eDiscovery Premium for large legal matters
- You need Communication Compliance for FINRA, SEC, or healthcare communication monitoring
- You want to replace your existing PBX with Teams Phone System
- You need Defender for Endpoint Plan 2 for advanced EDR
Industry-Specific Guidance
Healthcare (HIPAA)
E5 offers essential HIPAA controls. It includes features like:
- Sensitivity label auto-classification for handling PHI.
- DLP policies to prevent PHI leakage.
- eDiscovery Premium for supporting HIPAA breach investigations.
- Insider Risk Management to detect unauthorized PHI access.
- Audit Premium with a 10-year retention, exceeding HIPAA's 6-year documentation requirement.
Financial Services (FINRA, SEC)
Communication Compliance is required for firms regulated by FINRA. It monitors interactions on Teams, email, and Copilot for any regulatory violations.
Audit Premium offers the long-term data retention needed for SEC Rule 17a-4. Additionally, Customer Lockbox meets data sovereignty requirements for various financial regulators.
Legal and Professional Services
eDiscovery Premium offers review sets and predictive coding to lower costs for large-matter reviews. Information Barriers stop communication between practice groups, preventing conflicts of interest. Customer Lockbox ensures client confidentiality by requiring explicit approval for Microsoft data access.
Government (FedRAMP, CMMC)
Government clients usually require M365 GCC or GCC High rather than the commercial E3/E5 SKUs. These options have different pricing and licensing structures.
EPC Group has expertise in:
- FedRAMP compliance configurations
- CMMC compliance configurations
- Both commercial and government cloud environments
EPC Group License Optimization Approach
EPC Group does not automatically recommend E5 for every organization. We begin with a license optimization assessment. This assessment looks at your:
- Current security posture
- Compliance requirements
- Existing add-ons
- Regulatory obligations
After this, we compare the total cost of E3 plus add-ons against E5 based on your user count.
Many organizations realize they are paying for add-ons that the E5 plan would include at a lower total cost. Others determine that the E3 plan meets their risk profile. We provide you with the data needed to make an informed decision.
Frequently Asked Questions
What is the price difference between M365 E3 and E5?
Microsoft 365 E3 costs $36 per user each month. E5 costs $57 per user each month. This creates a difference of $21 per user monthly.
For an organization with 500 users, the total cost difference amounts to:
- $126,000 per year.
However, purchasing E5-exclusive features as add-ons to E3 would cost about $35 per user per month more. This makes E5 a better value if you need multiple add-ons.
Is eDiscovery Premium only available in E5?
eDiscovery Premium is available only with the E5 plan. It includes several key features:
- Review sets
- Predictive coding
- Advanced analytics
In contrast, the E3 plan offers eDiscovery Standard. This version supports basic case creation, search, and export.
Organizations that handle large legal matters or have strict eDiscovery requirements usually need:
- E5 plan
- Standalone eDiscovery Premium add-on
Does E5 include Phone System for Teams calling?
Yes, E5 includes the Microsoft Teams Phone System. This system replaces traditional PBX features with cloud-based options like:
- Call routing
- Voicemail
- Auto-attendants
- Call queues
However, you still need a Calling Plan or Direct Routing setup to connect to the PSTN for external calls. The Phone System by itself does not allow for external calling.
Can I mix E3 and E5 licenses in the same tenant?
Yes, Microsoft permits mixed E3/E5 licensing within a single tenant. Many organizations assign E5 licenses to roles that are sensitive to security or compliance. These roles typically include:
- Legal
- HR
- Finance
- Executives
Meanwhile, E3 licenses are given to the broader workforce. EPC Group's license optimization assessments pinpoint which roles gain the most from E5 licenses.
Does E5 include Power BI Premium?
E5 includes Power BI Pro. This is the per-user license for creating and sharing reports in the Power BI service. However, it does not include Power BI Premium or Microsoft Fabric capacity.
Premium capacity is a separate per-capacity license. You can choose between F-SKU or P-SKU for large-scale, organization-wide analytics deployments.
Should we upgrade from E3 to E5 for Copilot deployment?
E5 is not necessary for Copilot deployment. An E3 license is enough as the base requirement. However, E5 offers important security and compliance features that enhance deployment. These features include:
- Sensitivity labels
- DLP (Data Loss Prevention)
- Insider Risk Management
- Audit Premium
These tools make a safe and governed Copilot deployment much easier. EPC Group recommends E5 for any regulated industry using Copilot.
Get Expert M365 License Guidance
EPC Group has conducted license optimization assessments for enterprise M365 tenants in regulated industries. We analyze your compliance needs, current add-ons, and overall costs.
This allows us to provide a clear recommendation between E3 and E5 licenses, backed by detailed numbers.