I have access to 15+ UNIX boxes at work, and I do not consistently log onto all of them over time. When I do try to access one I havent been on in awhile, my account is locked as the password has expired.

I need to request to the UNIX SA's that the password expiration is 90 days and that if it expires, it prompts me to change my password, instead of locking the account. What is the technical commands of my request is my question so there is no mistaking my request.