Office 365 Advanced eDiscovery
Part of eDiscovery — Premium
eDiscovery Included in 26 licenses
Microsoft 365
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 E5 Office 365 E3 plus advanced security, compliance, and voice (Teams Phone, Audio Conferencing) — the top Office-only Enterprise tier; no seat cap.