Identifies when the DomainKeys Identified Mail (DKIM) signing configuration is disabled in Microsoft 365. With DKIM in Microsoft 365, messages that are sent from Exchange Online mail will be cryptographically signed. This will allow the receiving email system to validate that the messages were generated by a server that the organization authorized and were not spoofed.
Rule type: query
Risk score: 47
Runs every: 5m
Searches indices from: now-30m (Date Math format, see also
Additional look-back time)
Maximum alerts per execution: 100
- Microsoft 365
- Continuous Monitoring
- Data Protection
Rule license: Elastic License v2
## Config The Office 365 Logs Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
event.dataset:o365.audit and event.provider:Exchange and event.category:web and event.action:"Set-DkimSigningConfig" and o365.audit.Parameters.Enabled:False and event.outcome:success
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