License E1, E3 and E5

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Feature AreaE1E3E5
Office AppsWeb/mobile onlyFull desktop + web/mobileFull desktop + web/mobile
Email & Calendar50 GB mailbox100 GB mailbox100 GB mailbox
OneDrive Storage1 TB/user1 TB/user1 TB/user
Teams & Collaboration✔️✔️✔️
SecurityBasicAdvanced (e.g., DLP, Defender P1)Premium (e.g., Defender P2, MDO, MDI)
Compliance ToolsBasic retentioneDiscovery (Standard), Legal HoldeDiscovery (Premium), Insider Risk
Windows License❌Windows 11 Enterprise E3Windows 11 Enterprise E5
AnalyticsBasic (Delve)Viva Insights (personal)Power BI Pro, advanced Viva Insights
Calling/Phone System❌❌✔️ Phone System & Audio Conferencing
Price Range (est.)~$10–12/user/month~$32–36/user/month~$57–62/user/month

🔍 Deeper Breakdown by Category

💼 Productivity & Office Apps

  • E1: Only web-based Office apps (Word, Excel, etc.).

  • E3/E5: Full Office suite for desktop, web, and mobile.

📧 Email, Calendar, & Storage

  • E1: 50 GB mailbox per user.

  • E3/E5: 100 GB mailbox + archiving and retention.

🔐 Security

  • E1: Basic security.

  • E3: Adds Microsoft Defender for Office 365 Plan 1, DLP, IRM, and Azure AD Premium P1.

  • E5: Includes Microsoft Defender for Office 365 Plan 2, Defender for Endpoint, Defender for Identity, and Azure AD Premium P2 (for risk-based conditional access, etc.).

📜 Compliance

  • E3: Standard tools like Litigation Hold, DLP, Core eDiscovery.

  • E5: Premium compliance features like Advanced eDiscovery, Insider Risk Management, Customer Key, and Information Barriers.

📞 Communication & Voice

  • Only E5 includes:

    • Phone System (cloud-based PBX)

    • Audio Conferencing (dial-in to Teams meetings)

    • Call Analytics

👥 Ideal Use Cases

  • E1: Best for frontline workers or light users who only need web-based tools.

  • E3: Balanced plan for most knowledge workers needing advanced compliance and desktop apps.

  • E5: Best for highly regulated industries, enterprises with advanced security/compliance needs, or those replacing phone systems with Teams.

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