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Exchange 2000 IMAP to Exchange 2003 IMAP Referral

Hello,

We are in the process of migrating from Exchange 2000 to Exchange 2003. The Exchange 2003 server has been setup in our existing Exchange 2000 Organization. I've configured and started the following services; SMTP, POP, IMAP. 1 test account has been moved to the new server using the Exchange 2003 move mailbox utility. My clients MAPI profile is configured with the original Exchange 2000 server name. The Exchange 2000 server referred my MAPI client to the new Exchange 2003 server and changed the server name as well (All is good so far). Because we have client that connect by POP and IMAP I decided to check these as well. When I configured my POP client to use the Exchange 2000 server the Exchange 2000 server referred my client to the new Exchange 2003 server as well. However the problem occurs when configuring my IMAP client using the Exchange 2000 name that it breaks. It appears as though the Exchange 2000 server is referring the client to the new Exchange 2003 server but I receive the following message Outlook Express.

Account: 'my.Exchange2000server.com', Server: 'my.Exchange2000server.com', Protocol: IMAP, Server Response: 'REFERRAL imap://myaccountname;AUTH=*@my.Exchange2003server.com/INBOX] There is no replica for that mailbox on this server.', Port: 143, Secure(SSL): No, Error Number: 0x800CCCD2

If I configure my IMAP client to use the new Exchange 2003 server then their is not a problem finding authenticating and downloading my mail. However, this is a big problem because I have several hundred clients that I would have to reconfigure. I hope this is enough explanation into the problem, if not please ask I will provide what information I can.

Thanks in Advance!
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cperry
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cperry
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1 Solution
 
marc_nivensCommented:
It's possible that the client does not properly support IMAP referral.  You can avoid having to edit the clients one by one if you make the Exchange 2000 server a Front End Server.   Just make sure you've moved all of the mailboxes and public folders off first.
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cperryAuthor Commented:
This happens with Entourage also, which the majority of my MAC clients use. I prefer not to make this server a Front End Server at the moment because of the number of accounts I need to migrate. Because of this issue it would disrupt service to these clients without manually changing each of the client IMAP configuration to point to the Exchange 2003 server.
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marc_nivensCommented:
Unfortunately I don't see a lot of choices here, unless Entourage has a fix that will support IMAP referral.  Even then you would have to apply it to all clients so it kinda defeats the purpose.  
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