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Q192066: XADM: Event Service with Internet Explorer 4.01 Hangs NT Shell

Article: Q192066
Product(s): Microsoft Exchange
Version(s): winnt:5.5
Operating System(s): 
Keyword(s): exc55sp2fix exc55
Last Modified: 28-JUL-2000

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The information in this article applies to:

- Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

When you right-click the Internet Explorer icon on the desktop, select
Properties, and click OK, the Windows NT logon shell (Explorer.exe) hangs. This
happens when you have Internet Explorer 4.01 and Exchange Server build 1960 (or
later) installed on a clean Windows NT Server 4.0 with Service Pack 3.

CAUSE
=====

Explorer.exe sends a windows broadcast message to all top-level windows awaiting
response. In the Exchange Server event service, the broadcast message is missed
by one of the COM threads and another thread is performing "if (Peek..." instead
of "while(Peek," missing the message completely, which results in Internet
Explorer hanging.

For additional information, click the article number below to view the article in
the Microsoft Knowledge Base:

  Q136885 INFO: OLE Threads Must Dispatch Messages

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server
version 5.5. For additional information, please see the following article in the
Microsoft Knowledge Base:

  Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack



STATUS
======

Microsoft has confirmed this to be a problem in Exchange Server 5.5.


Additional query words:

======================================================================
Keywords          : exc55sp2fix exc55 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

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