ORCA.119: Similar Domains Safety Tips is enabled.
| ID | ORCA.119 |
| Severity | Info |
| Suite | ORCA |
| Product | Defender |
| Related products | Exchange Online |
| Feature | Anti-phishing |
| Security area | Email and collaboration protection |
| Resource type | Policy |
| Framework controls | nist-800-53-r5:SI-8 Spam Protection |
| MITRE ATT&CK | T1566, T1684.001 |
| Reads from | Exchange Online |
| Licence needed | ATP_ENTERPRISE |
What this checks and how to fix it
Section titled “What this checks and how to fix it”Microsoft Defender for Office 365 can show a warning tip to recipients in messages that might be from an impersonated domain.
Remediation action
Section titled “Remediation action”Enable Similar Domains Safety Tips so that users can receive visible indication on incoming messages.
Related Links
Section titled “Related Links”- Microsoft 365 Defender Portal - Anti-phishing
- Recommended settings for EOP and Microsoft Defender for Office 365 security
Mito check, based on ORCA. Author: soulemike. Open-source licences.
Open-source licences. CIS Benchmark material © Center for Internet Security, Inc.; CISA SCuBA baselines are public domain (CC0).
© 2026 Virtual Petals. Mito is a Virtual Petals service, hosted in Microsoft Azure UAE North.