ORCA.110: Internal Sender notifications are disabled.
| ID | ORCA.110 |
| Severity | Low |
| Suite | ORCA |
| Product | Defender |
| Related products | Exchange Online |
| Feature | Anti-malware |
| Security area | Email and collaboration protection |
| Resource type | Policy |
| User impact of fixing | Low |
| Effort to fix | Low |
| Reads from | Exchange Online |
What this checks and how to fix it
Section titled “What this checks and how to fix it”Notifying internal senders about malware detected in email messages could have negative impact. An adversary with access to an already compromised mailbox may use this information to verify effectiveness of malware detection.
Remediation action
Section titled “Remediation action”Disable notifying internal senders of malware detection.
Related Links
Section titled “Related Links”- Microsoft 365 Defender Portal - Anti-malware
- Recommended settings for EOP and Office 365 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).
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