<div cla
Quick answer: why teams layer email security on top of Microsoft 365 E5
Microsoft 365 E5 is the ceiling of Microsoft native email security. It includes Defender for Office 365 Plan 2, which adds automated investigation, Threat Explorer, and Attack Simulation Training on top of the Plan 1 detection that now ships with E3. It is a strong baseline. It also leaves specific, repeatable gaps, and if those gaps sit at the top tier, they sit at every tier below it too.
First seen on securityboulevard.com
Jump to article: securityboulevard.com/2026/08/7-reasons-teams-add-email-security-beyond-microsoft-365-e5/

