ORCA.158: Safe Attachments is enabled for SharePoint and Teams.
| ID | ORCA.158 |
| Severity | Medium |
| Suite | ORCA |
| Product | Defender |
| Related products | SharePoint, Teams |
| Feature | Safe Attachments |
| Security area | Email and collaboration protection |
| Resource type | Tenant |
| User impact of fixing | Low |
| Effort to fix | Low |
| Framework controls | nist-800-53-r5:SI-3 Malicious Code Protection |
| MITRE ATT&CK | T1080, T1204.002 |
| 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”Safe Attachments can assist by scanning for zero day malware by using behavioural analysis and sandboxing techniques. These checks suppliment signature definitions.
Remediation action
Section titled “Remediation action”Enable Safe Attachments for SharePoint and Teams.
Related Links
Section titled “Related Links”- Microsoft 365 Defender Portal - Safe attachments
- Recommended settings for EOP and Microsoft Defender for Office 365
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.
