Conference call dropped after 28 or 56 minutes joining from Cisco phone in Skype for Business Server

Applies to: Skype for Business Server 2015Skype for Business Server 2019

Symptoms


In Microsoft Skype for Business Server 2019 or Skype for Business Server 2015, when you have a conference call with a user who joins the call by using a Cisco phone, the call will be unexpectedly disconnected after 28 or 56 minutes.

Resolution


To fix this issue, install one of the following updates:

Third-party information disclaimer
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.