Audit Trail functionality in Netsuite provides a way to investigate who has made the changes in our account.
If we are looking for who has enabled/disabled a feature in our Netsuite account then using NS administrator role go to
Setup > Company > Enable Features and hover the mouse on More(looking in the top right cornor of the screen) and click Audit Trial.
It will provide a list of all the enabled/disabled features inour account and alsoprovide information like who did it and on which day.