Specifies the default proxy behavior for the application.
<lc:proxyByDefault action="true" | "false" />
If true, the server automatically proxies any messages that are not handled by the application. If false, the message is dropped and applications that follow this application in the application execution order will not receive it. The default value is true.
A message is considered handled if one of the following happens during the execution of the application's MSPL script:
For more information about application execution order see Managing a SIP Application on Lync Server.
The namespace prefix "lc" in the preceding usage example is the default namespace prefix, but can be replaced with any string value that you assign to your namespace using the xmlns attribute of the applicationManifest element.