Final answer:
To enable impersonation, the '.doAs' property found in the $BIGSQL_HOME/conf directory is generally set to true, allowing user jobs to execute on behalf of others. The exact properties may vary by software version and setup.
Step-by-step explanation:
To enable impersonation in the context implied by the question, you typically need to set specific properties within a configuration file to true. However, without context on the software or service being referred to, it's challenging to pinpoint exactly which properties are needed. If we are discussing a Big SQL service, then the property in the $BIGSQL_HOME/conf directory that usually handles impersonation is called '.doAs'. The .doAs property can be set to true to enable that the user executing a job is allowed to do so on behalf of another user, which is essentially what impersonation is.
It is essential to note that configurations can differ depending on the version and setup of the service you are using. Always consult the official documentation or support resources for your specific software version to determine the exact steps for enabling impersonation.