Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. "Connection is not established" error message in a Lync 2010 client when an attendee is disconnected from an application-sharing session in a large conference

"Connection is not established" error message in a Lync 2010 client when an attendee is disconnected from an application-sharing session in a large conference

View products that this article applies to.

Symptoms

Certain attendees are disconnected from an application-sharing session in a conference if the attendee amount becomes more than 200.Additionally, the disconnected attendees receive the following error message: 

Connection is not established.

Additionally, a retry button is displayed to rejoin the application-sharing session.

↑ Back to the top

Cause

This issue occurs when too many messages are queued in a Remote Desktop Protocol (RDP) API thread. All new connect viewer calls in the Application Sharing Server (ASMCU) are rejected. Therefore, RDP loses certain protocol packets.

↑ Back to the top

Resolution

To resolve this issue, install the following cumulative update:
2496325 Description of the cumulative update package for Lync 2010: April 2011

↑ Back to the top

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

↑ Back to the top

Keywords: kbqfe, kbfix, kbsurveynew, kbexpertiseinter, kbhotfixrollup, kb

↑ Back to the top

Article Info
Article ID : 2497779
Revision : 1
Created on : 1/7/2017
Published on : 4/6/2011
Exists online : False
Views : 423