Hi Raj, No we are purely on NT 4.0 environment. Both sides are having NT 4.0 domains with the 2 way trust. Is this something have to do with ""RPC Over HTTP" for Outlook 2003 ? Regards, Sudhir Kaushal Systems Administrator ( Hosted Team ) eGain Communications Pvt. Ltd. Hello - (+91 20) 4222812, (+91 20) 4228607, Ext-126 -----Original Message----- From: Periyasamy, Raj [mailto:Raj.Periyasamy@xxxxxxxxxxxx] Sent: Monday, January 19, 2004 8:02 PM To: [ExchangeList] Subject: [exchangelist] RE: Configuring additional Mailbox using Outlook 2003 http://www.MSExchange.org/ Are you running on Windows 2000 domain environment ? If so, have you got the ADCs in place. Is the SRS replicating information between Exchange 5.5 and AD correctly ? Regards, Raj -----Original Message----- From: Sudhir Kaushal [mailto:skaushal@xxxxxxxxx] Sent: Saturday, January 17, 2004 5:29 AM To: [ExchangeList] Subject: [exchangelist] Configuring additional Mailbox using Outlook 2003 http://www.MSExchange.org/ Hi, I have one user who used to open additional mailboxes located on another Exchange 5.5 site for which he has rights using Outlook 2k. Recently i installed outlook 2003 for him, and i am not able to add those additional mailboxes for him. It gives me the error that Exchange server could not be contacted. However i am able to add mailbox which is located on my Exchange 5.5 site. Even I tried adding new profile and configured the alias, but its not resolving mailbox name so can't proceed further. Do this needs some other configuration or i am missing something. Regards, Sudhir Kaushal Systems Administrator ( Hosted Team ) eGain Communications Pvt. Ltd. Hello - (+91 20) 4222812, (+91 20) 4228607, Ext-126 ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------