Migrate problem exchange 2000-2003. Problem after moving a mailbox.

I have started to plan/test to move all my users from an old exchange 2000 server over to a new exchnage 2003 server. I did the domain prep and the install of 2003 went fine. I even got to move the first mailbox without problems. Login in as the user also works fine. The problem starts when i want to send a email to the moved user. It does not get trough. I can send to the other persons in the same domain though.

All my users are in the same domain (user@domain.com). It seems like the first exchnage 2000 server doesnt know that the moved mailbox is located on the 2003 server . If i move the mailbox back to the 2000 server, then after some minutes mail starts comming in.

Anyone?
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joachimsAsked:
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SembeeConnect With a Mentor Commented:
If you have configured the SMART HOST on the Default Virtual SMTP Server then you need to remove it and replace it with an SMTP Connector.
I have written instructions on how to do this here: http://www.amset.info/exchange/smtp-connector.asp

As for system folders, I usually refer people to the follow article, telling them to do everything up to but excluding removal of the existing Exchange server:

http://support.microsoft.com/default.aspx?kbid=307917

Simon.
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SembeeCommented:
Check whether both machines can telnet to each other on port 25. You should get an Exchange prompt. This will confirm that they can connect to each other at SMTP level.

Next - are you using any kind of SMART HOST configuration on the default SMTP server on the old server? That is the most common reason for an old server not communicating with the new one - the SMART HOST config is redirecting SMTP traffic destined for the new server to the internet.

My other tip for a migration is to do mailboxes last. Get public and system folders replicating first.

Simon.
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joachimsAuthor Commented:
both servers reply on port 25.

When it comes to smart host, the old 2000 server does send/recive all its in/out bound mail through a smtp server on our DMZ. So that migth be the problem. On the 2000 server smart host is configured to our DMZ smtp server.

How do i make it try to deliver it first to the 2003 server? Or what will be the best way to solve this?

When it comes to public folders, i only have a few test folders. We mainly use exchange for mailboxes.  

What info is there in "system folders" that need to be replicated?
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