Microsoft 365 Apps for enterprise
Desktop Office apps (Word, Excel, PowerPoint, Outlook) Included in 43 licenses
Microsoft 365
Microsoft 365 E3 Office 365 E3's productivity core plus Windows, Intune device management, and Entra ID — the standard Microsoft 365 Enterprise plan; no seat cap.
Microsoft 365 E5 Microsoft 365 E3 plus the full Defender security suite, Purview compliance stack, and advanced analytics — the top Microsoft 365 Enterprise tier; no seat cap.
Microsoft 365 E7 Microsoft 365 E5 plus additional advanced security add-ons bundled into a single SKU — Microsoft's newest, highest Enterprise tier.
Office 365
Office 365 E3 Adds desktop Office apps and a fuller Exchange/SharePoint/compliance feature set to E1 — the standard mid-tier Enterprise productivity plan; no seat cap.
Office 365 E4 retired
Office 365 E5 Office 365 E3 plus advanced security, compliance, and voice (Teams Phone, Audio Conferencing) — the top Office-only Enterprise tier; no seat cap.