XADM: Event Service with Internet Explorer 4.01 Hangs NT Shell (Explorer.exe)

• Microsoft Exchange Server, version 5.5

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 Sever 4.0 with Service Pack 3.

CAUSE

Explorer.exe send 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 more information, please see the following 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 more 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 Microsoft Exchange Server version 5.5.

Keywords          : exc55sp2fix 
Version           : WinNT:5.5
Platform          : winnt 
Issue type        : kbbug 

Last Reviewed: April 21, 1999