All repositories will have an AUDIT folder with a [RepositoryName].log file in it. However, if the Laserfiche Server doesn't have any Audit Trail feature (Starter, Standard, Advanced) then it will not write anything to that file. In essence, nothing will be audited.

If later the customer decides to get Audit Trail, then once the Laserfiche Server is re-licensed and events are configured to be audited for trustees, the Laserfiche Server will then start writing to the log file.

In terms of what information you can get from the repository database itself, you can find out things like who created an entry or when it was created. However, you won't get any real useful audit data as it can't tell you which user deleted a document or who modified a field value, etc.