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Delivering POP mail to an Exchange account may result in duplicate email messages
Article ID: 2752393 - View products that this article applies to.
Consider the following scenario:
Outlook uses an associated message in the store named Outlook Message Manager to track the Unique Identifier number (UID) of messages. When you create a new profile, Outlook creates a new associated message that has a new search key. Because this message does not contain the UIDs of these messages, Outlook downloads them again.
To work around this issue, configure the POP3 account to deliver email messages to an Outlook data (.pst) file. Or, you can disable the Leave a copy of messages on the server option for the POP account.
Outlook 2007To change the delivery location of messages for a POP3 account in Outlook 2007, follow these steps:
Outlook 20120To change the delivery location of messages for a POP3 account in Outlook 2010, follow these steps:
983131For more information about how to configure a POP3 account to leave a copy of messages on the server, go to the following Microsoft website:
(http://support.microsoft.com/kb/983131/ )By default, a new Outlook Data File (.pst) is created in Outlook 2010 when you add a new POP3 account
Read POP3 email messages on multiple computers