Hi, As a minimum: Use an exchange aware backup program (such as ntbackup) and perform a full backup of the information store at least once per week - once per day if time permits. Perform a system state backup of at least one domain controller and the exchange server itself. Leif "Johann" wrote in message news:dpu0l6$a5f$1@ctb-nnrp2.saix.net... > > >