Check your AD connector and the event log. Stuff like this is basically ALWAYS to do with DNS. Exchange 2k gets really picky about DNS being *just* *right*. -----Original Message----- From: kimiagar kimiagar [mailto:kimiagar1974@xxxxxxxxxxx] Sent: Saturday, March 08, 2003 7:46 AM To: msexchange@xxxxxxxxxxxxx Subject: [msexchange] Re: Upgrade Exchange 5.5 to Exchange 2K I have set a MX record for my mail server in DNS and it does not have any problem because when I install a fresh exchange 2K everything is OK and I can send and receive email from the internet but when I upgrade my server using In_Place method or when I use move mailbox method I'm unable to receive email :(( ===================== Use the below link for Archives, and to set your preferences. http://thethin.net/exchangelist.cfm