http://support.microsoft.com/default.aspx?scid=kb;en-us;251152 Dolly _____ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew Hancock Sent: Thursday, April 06, 2006 1:34 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Inbound Mail Failure Ambiguous Recipient AutoForward Issue We have just started our Exchange 5.5 to Exchange 2003 Migration. (better late than never) Background Stable Win2k3 AD environment, with three domain controllers with a single Exchange 5.5 server and organization. We've been testing this for many months in a lab environment. We followed the Deployment setup, and checking logs as we go and have not seen any errors. We have just installed the ADC on a domain controller and completed the two way connection to our Exchange server, and we've been checking that replication is working for a few days before, altering the connection agreement to the first Exchange 2003 (non clustered) Standard Edition server. Shortly after the connection agreement had be configured and replication had started, the Postmaster for Exchange 5.5 started to receive the following messages The following recipients did not receive the attached mail. Reasons are listed with each recipient: <andrew.hancock@xxxxxxxx> andrew.hancock@xxxxxxxxx MSEXCH:IMS:IT::EXCHANGE 0 (000C0595) Ambiguous Recipient The message that caused this notification was: I believe this is somthing to do with Autoforwarders we have setup in Exchange 5.5, and possibly duplicate smtp addresses in AD? Any guidance would be grateful. Andrew -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/301 - Release Date: 04/04/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/302 - Release Date: 05/04/2006 The information contained in this e-mail is intended only for the personal and confidential use of the recipient(s) named above. If you are not the intended recipient(s) or the person responsible for delivering this communication to the intended recipient(s), you are hereby notified that you have received this communication in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. Please notify the sender immediately via e-mail and delete this e-mail from your system. iMDsoft shall not be liable for any damage of whatsoever nature in connection with any information received in error.