My exchange 2007 system email id suddenly changed to MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e@mydomain.com How can I change it back?

Are you running on Exchange 2007 SP1 UR7 or recently installed it? Unresolved sender for delivery status notifications (DSN) message after you install update rollup 7 for Exchange Server 2007 Service Pack 1 http://support.microsoft.com/?kbid=969690 In that case, fix is included into Update Rollup 8. Suggest you to install it to correct the problem... Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

Hi,Please open Adsiedit, then expand Expand Configuration, expand CN=Configuration,DC=contoso,DC=com, expand CN=Services, expand CN=Microsoft Exchange, expand CN=<OrganizationName>, and then expand CN=Transport Settings. In the details pane, right-click CN=MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e, and then click Properties. Check the displayName, then change it to Microsoft Exchange. Click OK and test the issue again. A similar thread: http://social.technet.microsoft.com/Forums/en-US/exchangesvrtransport/thread/166f6cbd-cb1f-494c-aff4-dee3c4b20714Thanks,Elvis

Thank you Amit and Elvis, I solved the issue by installing update rollup 8; which was scheduled to be installed in the next maintenance cycle.