Aultomatic User Locks due to no activity/no logins

Hi All,

I am on version 4.6C. I am looking for a way to lock users automatically if they don't logon for a period of lets say 90 days. I want to know if there is a way, preferably a system parameter which can do this for me?If not is there any standard way to automate this?

Best Wishes,

CP