Exchange Client Runs Slowly or Delays Opening with Proxy

 Last reviewed: October 6, 1997
Article ID: Q164089
The information in this article applies to:
  • Microsoft Proxy Server versions 1.0 and 2.0

SYMPTOMS

Microsoft Exchange Client runs very slowly or delays opening for long periods of time when it is opened on a Winsock proxy client computer. On IPX networks where the proxy is connecting to the Internet with RAS, this behavior causes the proxy to auto-dial.

CAUSE

This problem occurs because of a known problem with the Microsoft Exchange Client for Windows 95. This client makes a Winsock call even if TCP/IP is not used on the client computer. This causes a DNS name lookup to be requested by the proxy server. Usually, the delay for this name lookup is increased because the proxy server must dial and log on to the Internet.

WORKAROUND

To prevent this problem from occurring, modify the global Mspclnt.ini file (in the Proxy server Clients directory) as follows. (NOTE: Remember to refresh the Winsock Proxy files on the client before testing; otherwise, the WSP clients will refresh themselves every 6 hours.)

Add the section:

(For Microsoft Exchange Client) 

   [exchng32]
   Disable=1
(For the Outlook client) 

   [outlook]
   Disable=1
This will disable WSP for Microsoft Exchange Client, thus eliminating the delay, and the use of the proxy to access the local computer running Microsoft Exchange Server. You can also optionally add the following section for the MAPI spooler: 

   [MAPISP32]
   Disable=1

Keywords          : kb3rdparty pxsinterop kb3rdparty
Version           : 1.0 2.0
Platform          : winnt
Hardware          : ALPHA x86

================================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: October 6, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.