The user is added to the Restricted users page in the Microsoft 365 Defender portal.
If a user exceeds one of the outbound sending limits as specified in the service limits or in outbound spam policies, the user is restricted from sending email, but they can still receive email. Microsoft Defender for Office 365 plan 1 and plan 2.This new experience brings Defender for Endpoint, Defender for Office 365, Microsoft 365 Defender, and more into the Microsoft 365 security center. The improved Microsoft 365 Defender portal is now available.
