In Microsoft Exchange Server 2007, IMAP4 clients may experience latencies or slowness when the clients are running against Exchange Server 2007-based servers.

For example, users who use IMAP4 clients may experience intermittent slow downloads of e-mail message headers and of e-mail message bodies.

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To resolve this problem in Exchange Server 2007 Service Pack 1, install Update Rollup 1 for Exchange Server 2007 Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base: To resolve this problem in the release version of Exchange Server 2007, install Update Rollup 6 for Exchange Server 2007.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

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