> 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/successful-unusual-guest-user-invitation.md).
# Successful unusual guest user invitation
### Synopsis
| Field | Value |
| -------------------- | ---------------------- |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | N/A (single event) |
| Deduplication Period | 1 Day |
| Required Data | AzureAD Audit Log |
| Detection Modules | Identity Threat Module |
| ATT\&CK Tactic | Persistence (TA0003) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Informational |
### Description
An identity successfully invited a guest user to the tenant with unusual characteristics.
### Attacker's Goals
An attacker can invite users to for evasion.
### Investigative actions
* Check who is the invited guest user.
* Check whether the inviter is permitted to perform such actions.
* Check if the domain of the invited guest is allowed for invitations in the organization.
### Variations
Rare successful guest invitation in the organization
**Synopsis**
| Field | Value |
| ----------------- | ---------------------- |
| ATT\&CK Tactic | Persistence (TA0003) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Low |
**Description**
An identity successfully invited a suspicious guest user to the tenant.
**Attacker's Goals**
An attacker can invite users to for evasion.
**Investigative actions**
* Check who is the invited guest user.
* Check whether the inviter is permitted to perform such actions.
* Check if the domain of the invited guest is allowed for invitations in the organization.
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