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. "An unknown participant is now joining" message is displayed in a transferred call in Lync 2013 (Skype for Business)

"An unknown participant is now joining" message is displayed in a transferred call in Lync 2013 (Skype for Business)

View products that this article applies to.

Symptoms

When you try to transfer a call to a mobile device in an audio conferencing provider (ACP) conference in Microsoft Lync 2013 (Microsoft Skype for Business), the call is transferred, but the media stream remains active. Additionally, you receive the following message on the transferred call:
An unknown participant is now joining

↑ Back to the top

Cause

This issue occurs because the client endpoint is connected to the Audio Video Multipoint Conferencing Unit (AVMCU) before the call transfer. However, after the transfer, the media session with the AVMCU is not disconnected.

↑ Back to the top

Resolution

To fix this issue, install the January 12, 2016 update (KB3114502) for Lync 2013 (Skype for Business).

Note Lync 2013 was upgraded to Skype for Business in April 2015.

↑ Back to the top

Keywords: kbqfe, kbfix, kbsurveynew, kbexpertiseinter, kb

↑ Back to the top

Article Info
Article ID : 3132305
Revision : 1
Created on : 1/7/2017
Published on : 1/12/2016
Exists online : False
Views : 222