This issue occurs when you have multiple SIP connections that are made to the same destination (same IP and port) in Microsoft Lync 2013 (Microsoft Skype for Business).
When this issue occurs, the clients are disconnected repeatedly. That may cause some problems such as signing in, instant messaging (IM) and presence delayed or intermittent.
When this issue occurs, the clients are disconnected repeatedly. That may cause some problems such as signing in, instant messaging (IM) and presence delayed or intermittent.