Hi all, I am a new member and not expert at MS Exchange faults. If anyone can help me with the problem I had and still looking. I installed Exchange 5.5 Administrator on another Server with Win2k. When you try to connect to the exchange server you cannot connect to it, the fault is "DS_E_communciation failure", although you can ping to the mail server, all in the same domain. Please help and Many Thks.