Lync Server 2013 and Avaya RCC integration logs the error: “Start-Line: SIP/2.0 481 Call Leg Does Not Exist”
Problem You’re setting up an RCC integration between Lync Server 2013 and Avaya’s AES (Application Enablement Services) server and while you’ve set up all of the configuration required for Lync Server 2013, users see a No Phone System Connection error at the bottom of their