Change the expiration date

I am using ADAM here and there are number of users. I am looking for a script that can help me to change the expiration date of all user password. I had kept that for 30 days I think. And the time has almost come when all account will be locked. I need some help here to change that date and extend the time. I need some script that can help me to modify AccountExpires. How can I do this.

The attribute that you are talking has nothing to do with user password. It is for user account. And I am not sure about any script that can really work for the same. You have to do that manually. You can try looking on web, but there can be problem is the script is not proper.