Hello all, I know this is not the very good place for that but i did not find another place... sorry So, my exchange server crashed. The only solution I had is to reinstall it from the beginning. Now, w2k sp2 and AD are installed. I gave my new server the same name and ip address but now, I've the following problem : my AD has still some informations of the old exchange. So, how can I delete them properly ? My second problem is that my old exchange server was operations master (RID, PDC and schema). The new server can not retrieve these informations, so I tried to transfer the operations masters to another DC but i get the error message : the current FSMO holder could not be contacted. I tried to change it using ntdsutil.exe but no results... if someone can help me, I'd be very grateful. Per advance, thanks so much for your help Arnaud