Hi Michail,
That is an expected behavior in a domain-restricted QRadar environment.
CRE-generated events use the Custom Rule Engine log source, but those events are not treated the same way as normal external log source events. In IBM’s domain model, users only see data inside the domains assigned through their Security Profile, and domain restrictions take priority over other log source permissions.
The error means the Custom Rule Engine log source is not associated with the selected domain, so QRadar won’t allow it to be added to that restricted Security Profile. IBM also notes that CRE-generated events are not assigned domains through custom event properties because they are not parsed as events from external log sources.
So practically:
Adding the CRE log source may expose all CRE-generated events, not only the customer’s rules.
Filtering CRE visibility per tenant or per limited rule set is generally not supported cleanly through read-only permissions alone.
For multi-tenant use, the safer design is to ensure the offenses and original source events are domain-tagged correctly, then let customers view those through their restricted domain/security profile.
I would not grant broad CRE log source access unless you’re comfortable with cross-tenant visibility risk.