It would help to know the server names in this case. It looks like the 5.5 server doesn't know how to talk to the new Exchange server. Have you turned up logging to see everything that's happening? Al -----Original Message----- From: Rich Tibbets [mailto:rtibbets@xxxxxxxxxxxxxxxx] Sent: Thursday, March 11, 2004 12:04 PM To: [ExchangeList] Subject: [exchangelist] Event 290 Direc tory Operation Failed http://www.MSExchange.org/ Hi all, I have a mixed Exchange 5.5 /2000 sigle site. I added another E2K server the other day all went fine. No errors noted in event viewer. I moved a test account over to it. Now when sending an email to this account I get an NDR and an event 290 is entered in the 5.5 Server. Any help would be appreciated. Event 290: Event Type: Warning Event Source: MSExchangeMTA Event Category: X.400 Service Event ID: 290 Date: 3/11/2004 Time: 10:00:56 AM User: N/A Computer: PLATO Description: A non-delivery report (reason code directory-operation-unsuccessful and diagnostic code Omit any diagnostic code) is being generated for message C=us;A= ;P=national corpora;L=PLATO0403111500GHAGH8Z6. It was originally destined for DN:/o=NATIONAL CORPORATE RESEARCH/ou=NYCITY/cn=RECIPIENTS/cn=KUMAR§ (recipient number 3), and was to be redirected to . [MTA DISP:RESULT 18 136] (12) NDR: Your message did not reach some or all of the intended recipients. Subject: RE: Ucc Profile Sent: 3/11/2004 9:47 AM The following recipient(s) could not be reached: Kumar Munroe on 3/11/2004 9:47 AM A required directory operation was unsuccessful The MTS-ID of the original message is: c=US;a= ;p=National Corpora;l=PLATO-040311144704Z-7638 MSEXCH:MSExchangeMTA:NYCITY:PLATO ------------------------------------------------------ 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 ------------------------------------------------------