Article ID: 979790 - Last Review: June 18, 2010 - Revision: 2.0

An IMAP4 client crashes when accessing an Exchange Server 2010 mailbox

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SYMPTOMS

A user access a Microsoft Exchange Server 2010 mailbox by using an Internet Message Access Protocol 4 (IMAP4) client. The IMAP4 client crashes if there are S/MIME messages in the mailbox.
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CAUSE

This problem occurs because Exchange Server 2010 returns negative values for message size, which is incompatible with RFC.
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RESOLUTION

To resolve this problem, install the following update rollup:
982639  (http://support.microsoft.com/kb/982639/ ) Description of Update Rollup 4 for Exchange Server 2010
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STATUS

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

For more information about IMAP4, visit the following website:
General information about IMAP4 (http://www.ietf.org/rfc/rfc2060.txt)
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APPLIES TO
  • Microsoft Exchange Server 2010 Enterprise
  • Microsoft Exchange Server 2010 Standard
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Keywords: 
kbsurveynew kbexpertiseinter kbqfe kbfix kbhotfixrollup KB979790
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