Microsoft 365 New Inbox Rule Creatededit

Identifies when a new Inbox rule is created in Microsoft 365. Inbox rules process messages in the Inbox based on conditions and take actions, such as moving a message to a specified folder or deleting a message. Adequate permissions are required on the mailbox to create an Inbox rule.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-o365*

Severity: low

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-30m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Cloud
  • Microsoft 365
  • Continuous Monitoring
  • SecOps
  • Configuration Audit

Version: 1

Added (Elastic Stack release): 7.13.0

Rule authors: Elastic, Gary Blackwell, Austin Songer

Rule license: Elastic License v2

Potential false positivesedit

An inbox rule may be created by a system or network administrator. Verify that the configuration change was expected. Exceptions can be added to this rule to filter expected behavior.

Investigation guideedit

## Config

The Microsoft 365 Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule queryedit

event.dataset:o365.audit and event.provider:Exchange and
event.category:web and event.action:"New-InboxRule" and

Threat mappingedit