Microsoft KB Archive/322992

= XCCC: Practical Client Connection Limits for Online Data Conferencing =

Article ID: 322992

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange 2000 Conferencing Server Service Pack 1
 * Microsoft Exchange 2000 Conferencing Server Service Pack 2
 * Microsoft Exchange 2000 Conferencing Server Service Pack 3

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This article was previously published under Q322992



SYMPTOMS
When you (as a conference meeting organizer) book online data conferences in which desktop sharing or program sharing is provided for approximately 25 users, the following connectivity issues may occur:
 * Connections are disconnected.
 * Users cannot join.
 * Presentation material is not rendered.
 * CPU use by Conf.exe reaches 100% and never returns to typical levels.

When you add a user to the conference, you may receive the following error message:

Data Conference Capacity Limit

This data conference has reached its capacity and cannot accept any new users at the moment.

Please try the following:

xxxx

xxxx

Obtaining MCU Error #8004f004: Unable to attach the T.120 MCU while the conference technology provider

The log contains the following:

1527, Client connection refused, Conference at capacity



CAUSE
These issues may occur when any of the following conditions are true:
 * 1) There are approximately 25 data conference participants, or more, in a single conference.
 * 2) The presentation uses 256 or more colors.
 * 3) The presentation contains animation.
 * 4) The presentation contains complex graphics.

These issues are caused by a limitation in Microsoft NetMeeting. See the &quot;More Information&quot; section of this article.



RESOLUTION
To resolve this issue, use any or all of the following methods.
 * Limit the number of data conference participants to 25 or fewer.
 * Limit the number of colors that are used in the presentation.
 * Remove animation from the presentation.
 * Limit the amount or of graphics that are used in the presentations.



STATUS
By design



MORE INFORMATION
Microsoft NetMeeting is designed to handle approximately 25 total connections in a single data conference. The number of connections is limited because of the traffic data that is passed in the session. Too much traffic in a single data conference can cause the issues that are described in the &quot;Symptoms&quot; section of this article.

Additional query words: exch2kp2w

Keywords: kberrmsg kbprb KB322992

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