how to find all the users that are not logged on for the past one month? explain?

Are you looking for inactive accounts? If so, you can use following command: dsquery user –inactive 2 http://portal.sivarajan.com/2010/03/delete-stale-or-inactive-computer.html http://technet.microsoft.com/en-us/library/cc725702(WS.10).aspxSanthosh Sivarajan | MCTS, MCSE (W2K3/W2K/NT4), MCSA (W2K3/W2K/MSG), CCNA, Network+ Houston, TX http://blogs.sivarajan.com/ http://publications.sivarajan.com/ This posting is provided "AS IS" with no warranties, and confers no rights.