Select the Strong Passwords Required for All Users checkbox.
Select a Maximum Password Length. Passwords must contain fewer than the maximum number of characters.
Select a Password History Depth. The number specifies how many previous passwords are kept in the history and cannot be reused. For example, if Password History Depth is set to 5, users cannot reuse any of their previous five passwords.
Select a Password Expiration Frequency. All passwords expire after a set number of days. After a password expires, users will be asked to choose a new password the next time they log in.
Select Strong Password Requirements:
Passwords must contain at least one lowercase letter.
Passwords must contain at least one uppercase letter.
Passwords must contain at least one number.
Passwords must contain at least one special character (for example, an exclamation point or ampersand).