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pop 3 duplicates after upgrade to exchange 2k7 sp1

Posted on 2009-05-15
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Last Modified: 2013-11-05
Hi
We upgraded from office 2003 sp2 to exchange 2007 sp1. Since then In outlook express or outlook client. When leave mail on server is checked. in the pop3 set up. we get duplicate emails. Sometimes even 3 times. I have to leave the mail on the server so the mail does not stay on someone home computer. I have no clue and look everywhere  no answer how to stop the dupilicates. Used to be fine on exchange 2003
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Question by:jmilazzo
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apache09 earned 250 total points
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When you say Exchange 2003 and Exchange 2007, I take it you actually mean Outlook 2003 and Outlook 2007 as Exchange is a Type of Email Server?

First Upgrade to Office 2007 SP2 as this is the latest SP available for Office 2007.
http://www.microsoft.com/downloads/details.aspx?FamilyID=b444bf18-79ea-46c6-8a81-9db49b4ab6e5&displaylang=en


Check to see if this helps.

If it doesnt:

There are a few things you can check to stop duplicate email messages.

Start by checking Rules to be sure that copies are not being made to the Inbox, and make sure that all your rules end in "Stop Processing" actions.

Then check the task manager to be sure that there is only one instace of Outlook running. Two instances of outlook.exe running can produce two messages arriving at the same time. You will need to then determine why two instances of Outlook were running in the first place.

Another thing you can do is to delete/remove ALL your e-mail accounts and recreate them. This worked for some people.

Also, if your running Outlook XP, be sure that you are at service pack 2 or later. You can tell if you need to upgrade at Microsoft Product Updates.

Finally, another person had this happen when he had two e-mail accounts set up - using two e-mail addresses, but the same POP3 incoming and same SMTP outgoing. What happened is that the second account was getting the e-mails from the POP3 server before they were actually deleted after the first account was finished. If this is the problem you can disable the receive on the second account. There is a Microsoft article explaining the problem more thoroughly at http://support.microsoft.com/?kbid=284404.

From: http://www.sperrysoftware.com/Outlook/Outlook-Duplicates.asp#Q1
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