We just found out that the Action Log is activated when a user is assigned to a Configuration that has the option 'Recommendations’ switched ON.

See also idea: More options for Action Log in IAM

Hi Harm,

This feature can be turned on by changing the user preferences configuration in the user table.

When you click on the look up button, you can see several predefined configurations.

These configurations show which actions will be recorded in the use log user action table. If the predefined configurations don't match the requirements, a custom configuration can be added.

I hope this will answer your question.