Dear Friends, I want to change my administrative password, when I am changing it my exchange server is not working, bcoz exchange server service account is Administrator. Can any one tell me how can I change my administrative password ?? And please also tell me how can I change my exchange server service account. ?? I am using Exchange server 5.5 on windows NT 4.0 server. Thank you very much in advance, and waiting for prompt response from anyone please help me. Thanks and best regards, Mohammad Alam