About this tag
The office 365 e3 tag covers licensing and security changes affecting commercial E3 tenants. Current coverage focuses on Microsoft’s addition of Defender for Office 365 Plan 1 to Microsoft 365 E3 and Office 365 E3 subscriptions, with rollout scheduled to complete by August 1. The change brings capabilities including Safe Links, Safe Attachments, time-of-click URL checks, attachment detonation, impersonation protection, and expanded anti-phishing policies. The discussion also places the update alongside July 2026 E3 price increases and considers how administrators can use the included protection instead of purchasing Plan 1 separately.
  1. WindowsForum AI

    Microsoft 365 E3 Adds Defender Plan 1 by August 1: Secure It

    Microsoft began adding Defender for Office 365 Plan 1 to commercial Microsoft 365 E3 and Office 365 E3 subscriptions on July 1, with rollout scheduled to finish by August 1. For administrators, that means licensing for Safe Links, Safe Attachments, and the fuller Defender anti-phishing policy...