Use this procedure to change the variable that controls the length of time for password expiration:
Select Administration > Options.
The Configuration administration page appears.
Locate PasswordExpiration in the Variable column.
Enter an integer in the Value column. The integer indicates the number of days that elapse before the password expires. To disable password expiration, enter 0.
Click OK or Apply to submit the information.
The password expiration variable is changed to the new value.