Problem in Force Logoff

I have defined logon hours to be denied from 3 – 4 am for all Users.

Under Default Domain Policy and Domain Controller Security Policy I have enabled Force Logoff when logon hours expire.

Most users leave their computer on overnight, but with the Force Logoff enabled, the users do not get logged off when their hours expire.

I have read around and have seen that the force logoff does not actually force logoff as the name suggests.

Help me that is there any thirs party software which may enforce logoff when time expires

Thanks in advance for any help.