Microsoft KB Archive/192749

= Multiple SSL Connections May Cause Error Initializing Security Subsystem =

Article ID: 192749

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q192749



SYMPTOMS
A failure to initialize the security subsystem can occur when an application such as Microsoft Exchange Server attempts to replicate data over an SSL connection.



CAUSE
Schannel.dll can generate an error when two threads call AcquireCredentialsHandle at the same time, with the same certificate data.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack

NOTE: Depending on whether you are using 40-bit or 128-bit security, one of the two files listed for each platform will be renamed to Schannel.dll.



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Additional query words: 4.00

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB192749

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