365 License Lookup
A fast reference for Microsoft 365 and Office 365 licensing: which SKUs include a feature, what's inside a SKU, and what you'd gain or lose moving between two.
Based on data last updated by Microsoft on Aug 18, 2026 · See what's changed
Commercial GCC Education Nonprofit GCC High DoD
"Office 365" was Microsoft's original name for this cloud productivity suite — Word, Excel, Outlook, Teams, and the rest. "Microsoft 365" is that same productivity core plus Windows and device/security management, not just a rebrand. In 2020 most commercial Office 365 SKUs were renamed Microsoft 365, but Office 365 E1, E3, and E5 still exist as separate, purchasable SKUs alongside Microsoft 365 E3 and E5 — the Office 365 versions lack the Windows, Intune, Entra ID, and Defender pieces the Microsoft 365 versions add.
Business vs. Enterprise, roughly — a rough map, not an equivalence:
- Business Standard ≈ Office 365 E3's productivity core (Exchange, SharePoint, Teams, desktop Office) without E3's own slice of the Defender/compliance stack (Defender for Office 365, information protection, and richer Exchange/SharePoint plan tiers).
- Business Premium ≈ Business Standard plus a real slice of the Microsoft 365 E5 security stack — Intune, Entra ID P1, Defender for Business — but not E5's full Purview compliance suite (eDiscovery, records management, insider risk, advanced auditing), analytics, or audio conferencing/Teams Phone.
- Enterprise (E-series) SKUs: no per-SKU seat cap, the fullest compliance/security stack, and required once an organization needs more than 300 licensed seats.
Business Basic, Standard, Premium, and Apps for business are each capped at 300 seats — per SKU, not per organization, so a company can mix a capped Business SKU for most staff with an uncapped Enterprise SKU for the rest.
GCC High and DoD licensing aren't covered by this tool — consult a Microsoft licensing specialist for those environments.
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