ORCA.228 - No trusted senders in Anti-phishing policy.
Overview
Adding senders as trusted in Anti-phishing policy will result in the action for protected domains, Protected users or mailbox intelligence protection will be not applied to messages coming from these senders. If a trusted sender needs to be added based on organizational requirements it should be reviewed regularly and updated as needed.
Remediation action
Remove allow listing on senders in Anti-phishing policy.
Related Links
- Microsoft 365 Defender Portal - Anti-phishing
- Recommended settings for EOP and Microsoft Defender for Office 365
Test Metadata
| Field | Value |
|---|---|
| Test ID | ORCA.228 |
| Severity | Medium |
| Suite | ORCA |
| Product | Defender |
| Related products | Exchange Online |
| Feature | Anti-phishing |
| Area | Email and collaboration protection |
| Resource type | Policy |
| User impact | Low |
| Implementation cost | Medium |
| MITRE ATT&CK | T1566 Phishing, T1684.001 Impersonation |
| Supports controls | nist-800-53-r5:SI-8 |
| PowerShell test | Test-ORCA228 |
| Services | ExchangeOnline |
| Compatible licenses | ATP_ENTERPRISE |
Source
- Test:
tests/orca/Test.ORCA.228.ps1 - Documentation:
tests/orca/Test.ORCA.228.md