Mail client starts to pull duplicate emails from exchange server after Mailbox move

wrefai
wrefai used Ask the Experts™
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Hi there ;
I faced the problem after i moved exchange 2003 mailboxes to exchange 2007 in same domain.whatever mail client program i ve got in my organization (outlook2003,2007,outlook express,thunderbird...) running pop3 protocol started to download emails in a sense that there is a copy of all emails existing there! so this seems to be a major trouble for users have more than thousands of emails in their mailbox..it takes a quite much time to get done downloading..first i dont need to remove "leave a copy of messages on the server" mark (i want a copy left on server)..second i don need to use "remove duplicate message" like programs to remove them.i want to find a way to move mailboxes between exchange 2003 and 2007 without having duplication email issue and users get the new emails received after mailbox move once they push the "send/receive" button.
thank you.
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Commented:
Alas that is a problem with POP3.
The messages are seen by both the client and the server as a new message. POP3 isn't designed to have the setting "leave email on server" enabled. If you want to do that you need to use IMAP.
There is no solution to this problem, you will have to live with it.

Your best solution is to drop POP3 completely - for remote access use Outlook Anywhere with Outlook 2003 or higher.

Simon.

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