> 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/exchange-mailbox-audit-bypass.md).

# Exchange mailbox audit bypass

### Synopsis

| Field                | Value                                                                         |
| -------------------- | ----------------------------------------------------------------------------- |
| Activation Period    | 14 Days                                                                       |
| Training Period      | 30 Days                                                                       |
| Test Period          | N/A (single event)                                                            |
| Deduplication Period | 1 Day                                                                         |
| Required Data        | Office 365 Audit                                                              |
| Detection Modules    | Identity Threat Module, Email                                                 |
| ATT\&CK Tactic       | Defense Evasion (TA0005)                                                      |
| ATT\&CK Technique    | Impair Defenses (T1562), Impair Defenses: Disable or Modify Tools (T1562.001) |
| Severity             | Low                                                                           |

### Description

A user added mailbox audit bypass for an account. This will allow the account to perform actions without being logged, and may indicate an attempt to evade detection.

### Attacker's Goals

An attacker may abuse the audit bypass mechanism to conceal actions and evade detection.

### Investigative actions

* Follow further actions done by the account.
* Verify that the configuration change was expected.


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