LoFP / a user sending emails using personal distribution folders may trigger the event.

Techniques

• T1078

Sample rules

Microsoft 365 User Restricted from Sending Email

• source: elastic
• technicques:
  • T1078

Description

Identifies when a user has been restricted from sending email due to exceeding sending limits of the service policies per the Security Compliance Center.

Detection logic

event.dataset:o365.audit and event.provider:SecurityComplianceCenter and event.category:web and event.action:"User restricted from sending email" and event.outcome:success