A couple of choices: 1. You can have them create new Outlook profiles with a different name than the previous profile. 2. You can have them delete their nk2 files on the local drives (Which will delete all the cached entries - all of them) 3. You can add x500 custom addresses for each account that represents the old legacyexchangedn values of the old domain and add to each account so that old cached entries in Outlook will work.
-----Original Message----- From: Andrew McLaren [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 29, 2008 7:25 AM To: MS-Exchange Admin Issues Subject: Migrated Server, Clients Cached Addresses Our environment is Windows SBS 2003 with Outlook 2003 clients. 65 users. Over the weekend, I installed a fresh SBS installation onto new hardware (new domain, new hostname) and used ExMerge to copy the mailboxes to the new server. All seemed to be going well ... until Monday morning. Our external mail seems to be working fine, but internal mail is returning a lot of NDRs: SAMPLE NDR 'joe bloggs' on Tue, 29 Jan 2008 13:32:54 +0200 The message could not be delivered because the recipient's destination email system is unknown or invalid. Please check the address and try again, or contact your system administrator to verify connectivity to the email system of the recipient. OTHER INFO FROM THE NDR Final-Recipient: RFC822; [EMAIL PROTECTED] Action: failed Status: 5.1.2 X-Supplementary-Info: <thor.mynewdomain.local #5.1.2> X-Display-Name: 'cathy adhinarayana' After some reading about this issue I believe that it is caused by Outlook's cached most-recently-used-address list which somehow stores Active Directory information (from the old retired server) instead of an actual email address (seems like a daft idea to me). When a user starts a new email and just types the first few letters of the recipient's name, Outlook fills in the rest of the name. Exchange then rejects the email. What can I do? Thanks guys / gals! Regards, Andrew McLaren ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~