I've spent the better part of a work week kludging through the UCMA documentation, running shell commands and extracting msi folders out of the Lync Server evaluation ISO to get things to work that sounded so simple at first from reading the documentation. At last, my will is broken, and I am asking for some help.
After I establish the provisioned application platform, I am trying to invoke 'endpoint.InnerEndpoint.SendMessage', the same method used here: http://msdn.microsoft.com/en-us/library/office/hh364925(v=office.14).aspx
However, I get a SIP 481 error. I thought the whole point of sending page-mode messages was that I didn't have to establish a conversation with each and every target I am trying to send a message to. Can somebody please help me understand what I am doing wrong?