Symptoms

You're hosted on a LBR (Location-Based Routing) enabled pool of Microsoft Skype for Business Server 2015. When you initial a conference call, if one of the participants joins the call by using the "Call me at" feature for his local meeting room device such as Polycom Trio, the later participants can't join the conference by using a Skype for Business client. However, they can dial in by using PSTN to join the meeting.

Resolution

To fix this issue, install the January 2019 cumulative update 6.0.9319.537 for Skype for Business Server 2015, Front End Server and Edge Server.

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.

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