XCCC: Access Denied When Connecting to Exchange 2000 Conferencing Server (258050)


The information in this article applies to:

  • Microsoft Exchange 2000 Conferencing Server
This article was previously published under Q258050

SYMPTOMS

Conference participants are not able to connect and communicate correctly with the Exchange 2000 Conferencing service. Participants that attempt to connect to the conferencing server, may receive the following error message Web page:
You are not authorized to view this page
You might not have permissions to view this directory or page using the credentials supplied.

HTTP Error 403 - Forbidden
If participants attempt to browse a list of all published conferences, such as http://server/conferencing/list.asp, participants may receive the following error message Web page:
The page cannot be found
The page you are looking for might have been removed, had its name changed, or is temporarily unavailable.

HTTP 404 - File not found

CAUSE

This behavior occurs because the Exchfilt.dll Internet Server API (ISAPI) filter is not loaded or is not working properly. To verify this, you can manually place the participants language directory into the URL. For example:

http://server/conferencing/usa/list.asp

If the participant receives the List.asp, the Exchfilt.dll file is not working properly.

RESOLUTION

To resolve this behavior, verify the following settings:

Internet Services Manager

  • Default Web Site
  • Properties
  • ISAPI Filters

Filter Name: Microsoft Exchange Conferencing Web
Status: Loaded
Executable: X:\Program Files\Microsoft Exchange Conferencing Server\exchfilt.dll
Priority: Low

MORE INFORMATION

The Exchange 2000 Conferencing service writes multiple configuration entries and attributes into the Internet Information Service (IIS) Metabase. Below is a list of all Conferencing Metabase entries:

/W3SVC/1/FILTERS

NameUserTypeData
KeyTypeServerIIsFilters
FilterLoadOrderServerMicrosoft Exchange Conferencing Web Component

/W3SVC/1/FILTERS/MICROSOFT EXCHANGE CONFERENCING WEB COMPONENT

NameUserTypeData
Win32ErrorServer0
FilterStateServer1
FilterFlagsServer147459
KeyTypeServerIIsFilter
FilterPathServerx:\Program Files\Microsoft Exchange Conferencing Server\exchfilt.dll
FilterDescriptionServerMicrosoft Exchange Web Filter, v1.0

/W3SVC/1/ROOT/CONFERENCING

NameUserTypeData
AccessFlagsFile517
DirBrowseFlagsFile1073741854
AppIsolatedWAM2
AuthFlagsFile7
Win32ErrorServer0
KeyTypeServerIIsWebVirtualDir
PathFilex:\Program Files\Microsoft Exchange Conferencing Server\conferencing
AppRootFile/LM/W3SVC/1/Root/Conferencing
AppFriendlyNameWAMConferencing

W3SVC/1/ROOT/CONFERENCINGPRIVATE

NameUserTypeData
AccessFlagsFile517
DirBrowseFlagsFile1073741854
AppIsolatedWAM2
AuthFlagsFile6
Win32ErrorServer0
KeyTypeServerIIsWebVirtualDir
PathFilex:\Program Files\Microsoft Exchange Conferencing Server\conferencing
AppRootFile/LM/W3SVC/1/Root/Conferencing
AppFriendlyNameWAMPrivate

The file Exchfilt.dll responds to conferencing client join requests and directs them to their appropriate language directory.
Modification Type:MinorLast Reviewed:4/25/2005
Keywords:kberrmsg kbprb KB258050
©2004 Microsoft Corporation. All rights reserved.