> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/analytics-alerts/alerts-by-name/saas-suspicious-external-domain-user-activity.md).
# SaaS suspicious external domain user activity
### Synopsis
| Field | Value |
| -------------------- | ----------------------------------------------------------------------------------------------------- |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | N/A (single event) |
| Deduplication Period | 1 Day |
| Required Data | Requires one of the following data sources:
Google Workspace Audit Logs OR Office 365 Audit
|
| Detection Modules | Identity Threat Module, SaaS Threat Detection |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | External Remote Services (T1133) |
| Severity | Informational |
### Description
An operation was performed by an identity. This identity belongs to a domain that was not seen in the organization before.
### Attacker's Goals
Gain their initial foothold within the organization and explore the environment to achieve their target.
### Investigative actions
* Investigate the external domain name.
* Check the identity activity in the organization.
### Variations
Suspicious external user activity detected from a domain first seen in the organization
**Synopsis**
| Field | Value |
| ----------------- | -------------------------------- |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | External Remote Services (T1133) |
| Severity | Low |
**Description**
An operation was performed by an identity. This identity belongs to a domain that was not seen in the organization, both in cloud and SaaS environments.
**Attacker's Goals**
Gain their initial foothold within the organization and explore the environment to achieve their target.
**Investigative actions**
* Investigate the external domain name.
* Check the identity activity in the organization.
---
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