> For the complete documentation index, see [llms.txt](https://docs.oort.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.oort.io/understanding-check-failures/oort-insights/identity-threat-detection-insights/duo-sign-in-threat-detected.md).

# Duo Sign In Threat Detected

Detects successful user sign-ins associated with a Duo threat event, which may indicate unauthorized access.

**Recommended Actions**

Investigate this suspicious sign-in to confirm the account is not compromised. If the user is compromised, consider killing all sessions and add the user to a quarantine group.

**Compatibility**

[Duo](/integrations/duo-security-integration.md)