Explanation/Reference:
Explanation:
This security setting determines the number of unique new passwords that have to be associated with a user account before an old password can be reused. The value must be between 0 and 24 passwords.
This policy enables administrators to enhance security by ensuring that old passwords are not reused continually.
Reference: http://technet.microsoft.com/en-us/library/cc758950(v=ws.10).aspx