Werk #18664: Show warning on user deletion

Component Setup
Title Show warning on user deletion
Date Oct 9, 2025
Level Trivial Change
Class New Feature
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

When deleting users, a new validation checks whether they are referenced in notification rules as "Specific user". If a user is set as the only explicit user, a warning message is displayed with a link to the affected notification rules.

The user will still be deleted.

Furthermore, the notification rule list will now show a warning icon in the contact section of rules with an explicit user that does not exist.

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