Microsoft KB Archive/237544

= XADM: Unable to Connect Using IMAP/SSL =

Article ID: 237544

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q237544





SYMPTOMS
IMAP clients logging on using Secure Sockets Layer (SSL) may not be able to connect to the Microsoft Exchange Server computer. The event log on the server indicates only that the connection to the client is lost. The client logs record that the server has closed the connection unexpectedly. After it is terminated, subsequent connection attempts by any client to the IMAP/SSL port (port 993) are refused.



CAUSE
A fetch command with certain parameters on a larger message (occurs more frequently on bigger messages) causes the connection to the requesting client to be unexpectedly closed. The listening thread for port 993 also ends, thus, any subsequent connection attempts do not succeed.



RESOLUTION
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component: Information Store



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB237544

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