> For the complete documentation index, see [llms.txt](https://helpdesk.augmentt.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpdesk.augmentt.com/modules/secure/alerts/monitored-alerts/ual-mailbox-rule-alerts.md).

# UAL Mailbox Rule Alerts

These alerts watch the Unified Audit Log for mailbox (inbox) rule activity commonly associated with business email compromise — attackers creating or editing rules that forward, redirect, or delete mail to hide their tracks. These are distinct from the Purview Alerts (UAL) sign-in risk rules.

| Alert                                                                                                                                                                                | Category      | Severity |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------- | -------- |
| **A new mailbox rule was created that forwards emails to the RSS feeds folder** `office365_ualrule_new_inbox_rule_is_created_that_forwards_emails_to_the_rss_folder`                 | Exchange Risk | High     |
| **A new mailbox rule was created that forwards emails to a different domain** `office365_ualrule_new_inbox_rule_is_created_that_forwards_emails_to_a_different_email_address`        | Exchange Risk | High     |
| **A new mailbox rule was created that redirects emails to a different domain** `office365_ualrule_new_inbox_rule_is_created_that_redirects_emails_to_a_different_email_address`      | Exchange Risk | High     |
| **A new mailbox rule was created with a suspicious rule name** `office365_ualrule_new_inbox_rule_is_created_with_suspicious_rule_name`                                               | Exchange Risk | High     |
| **A mailbox rule was created that deletes emails** `office365_ualrule_inbox_rule_is_created_that_deletes_emails`                                                                     | Exchange Risk | High     |
| **An existing mailbox rule was edited that forwards emails to the RSS feeds folder** `office365_ualrule_set_inbox_rule_is_created_that_forwards_emails_to_the_rss_folder`            | Exchange Risk | High     |
| **An existing mailbox rule was edited that forwards emails to a different domain** `office365_ualrule_set_inbox_rule_is_created_that_forwards_emails_to_a_different_email_address`   | Exchange Risk | High     |
| **An existing mailbox rule was edited that redirects emails to a different domain** `office365_ualrule_set_inbox_rule_is_created_that_redirects_emails_to_a_different_email_address` | Exchange Risk | High     |
| **An existing mailbox rule was edited with a suspicious rule name** `office365_ualrule_set_inbox_rule_is_created_with_suspicious_rule_name`                                          | Exchange Risk | High     |


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