Microsoft KB Archive/201662

= XADM: Exchange Server Event Service with Internet Explorer 4.01 Hangs Windows NT Shell =

Article ID: 201662

Article Last Modified on 10/26/2006

-

APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition, when used with:
 * Microsoft Windows NT 4.0 Service Pack 3

-



This article was previously published under Q201662





SYMPTOMS
On a computer that is running Exchange Server build 5.5.1960, Windows NT Server 4.0 Service Pack 3, and Microsoft Internet Explorer 4.01, when you right-click the Internet Explorer icon on the desktop, click Properties on the shortcut menu, and then click OK, the Windows NT logon shell (Explorer.exe) stops responding (hangs).



CAUSE
This problem can occur because Internet Explorer generates a windows broadcast message to all top-level windows, and Internet Explorer is waiting for a response. In the Exchange Server event service, although a window is not created directly, one of the Component Object Model (COM) application programming interfaces (API) creates a window resource internally. In the event service, the broadcasted message is missed by one of the threads and another thread is performing "if (Peek..." instead of "while(Peek" and misses the message completely, so Internet Explorer hangs waiting for a response.



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

You can also resolve this problem by upgrading to Windows NT Server 4.0 Service Pack 4 and Exchange Server 5.5 Service Pack 1 with fix number 58842.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in ExchangeServer version 5.5 Service Pack 2.

Keywords: kbbug kbfix KB201662

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.