> 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-dkim-signing-configuration-disabled.md).
# Exchange DKIM signing configuration disabled
### 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), Initial Access (TA0001) |
| ATT\&CK Technique | Impair Defenses: Disable or Modify Tools (T1562.001), Phishing (T1566) |
| Severity | Low |
### Description
A user disabled an Exchange DomainKeys Identified Mail (DKIM) signing configuration. DKIM helps ensure that emails are authorized and not spoofed.
### Attacker's Goals
An attacker is attempting to evade detection.
### Investigative actions
* Follow further actions done by the account.
* Verify that the configuration change was expected.
* Check for a possible phishing campaign on the organization.
### Variations
A recently configured Exchange DKIM signing configuration was disabled
**Synopsis**
| Field | Value |
| ----------------- | ---------------------------------------------------------------------- |
| ATT\&CK Tactic | Defense Evasion (TA0005), Initial Access (TA0001) |
| ATT\&CK Technique | Impair Defenses: Disable or Modify Tools (T1562.001), Phishing (T1566) |
| Severity | Informational |
**Description**
A user disabled an Exchange DomainKeys Identified Mail (DKIM) signing configuration. DKIM helps ensure that emails are authorized and not spoofed.
**Attacker's Goals**
An attacker is attempting to evade detection.
**Investigative actions**
* Follow further actions done by the account.
* Verify that the configuration change was expected.
* Check for a possible phishing campaign on the organization.
---
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