halo everyone, about a week ago, i installed ex2k to serverA(win2k advanced), all client using outlook, there was no problem but when i promoted another server (ServerB) to a dc and i installed ex2k to serverB and then i moved all client's exchange server to ServerB, there was a problem which is 2 Servers need to run together in order to use outlook. so if i turn off ServerA, outlook can't find ex2k in ServerB (outlook is using exchange server in ServerB) Is there a primary and secondary ex2k server or i am missing something here? any kind of help would be greatly appreciated thanx in advance Andris Tenda PT Libra Emas Permata- IT Division Jl. Pluit Raya 19 Blok E9-10-11 Jakarta- Indonesia Phone : +62-21-662-4744 Fax : +62-21-662-4746 Mobile : +62-812-9734597 edp@xxxxxxxxxxxxxx http://www.libramas.co.id