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:
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.
Article ID: 3132305 - Last Review: Jan 12, 2016 - Revision: 1
Microsoft Lync Server 2013, Skype for Business