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When you receive a new e-mail message, Microsoft Outlook does not notify you that a new e-mail message has arrived. This problem occurs even though you have configured Outlook to notify you about new e-mail messages.
This problem occurs when a new e-mail message arrives from an e-mail account that is on an Internet Messaging Access Protocol (IMAP) server. When you receive new e-mail messages from servers other than IMAP servers, you are notified.
Microsoft is researching this problem and will post more information in this article when the information becomes available. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.