When you change the local or domain Maximum password age policy, the User must change password at next logon box is not checked for all users. When you change the Maximum password age in Windows NT 4.0, the User must change password at next logon box was checked for all users that had a password that could expire.

Windows 2000 and Windows Server 2003 no longer set the User must change password at next logon box for users.

You can script setting the User must change password at next logon box using Require Users to Change Their Password