Question about a specification of audit.

[ABCLBasis]

Hello.

I have a question about the specification of the audit log.

According to the official website,
activities on the console/front end are recorded as audit logs.

I can see some logs there, however, it seems some update activities have been missed.

On the Zabbix server we use,
one of my teammates update the item's formula and it caused a problem with monitoring as a result.
However, there is no record of change in the item on the audit log.
Therefore, we can't figure out who did it, and what exactly they did.

So my question is;
Are all changes and updates on hosts' items recorded on audit logs, or is it limited?
Is there any document to see the objects of the audit log or its specification?
I've already checked the official manual below.

https://www.zabbix.com/documentation/4.0/en/manual/web_interface/frontend_sections/reports/audit?hl=Audit

The server version is 4.0.8.

Thank you and best regards.

[cyber]

No, not everything has been recorded. specially in older version like 4.0. It has been improved over the years and newer versions record much more data. I think release notes can give you some hints, what has been added...