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: covered GCC: covered Education: covered Nonprofit: covered GCC High: not covered DoD: not covered

"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.

Microsoft caps a tenant at 300 seats in total across the Business plans (Basic, Standard and Premium), not 300 per plan. Enterprise plans can sit alongside them in the same tenant, so a company can license up to 300 staff on Business plans and the rest on an Enterprise plan.

GCC High and DoD licensing aren't covered by this tool — consult a Microsoft licensing specialist for those environments.

This tool covers what a license includes today. For features Microsoft has announced but not yet shipped — and whether their target dates have moved — see the 365 Roadmap Tracker, which does cover GCC, GCC High and DoD.

Once you know which license carries a feature, Microsoft Portals is where to find the admin center that actually turns it on — including the GCC High, DoD and 21Vianet hostnames for the ones that differ.