I've been trying to get calls into a UCMA app from a Skype endpoint, and while it seems to work from the Metro Lync client, the desktop one appears to be broken. No matter what, the endpoint always shows up as offline. I've noticed that regular Lync users also appear as offline most of the time in Skype, so it may be a systemic problem. The reason things appear to work in Metro is that the client will let you call an offline lync user (while the desktop version blocks this).
Any ideas of what else to try to troubleshoot this? I tried tracing the edge server, and didn't see a subscription notice through it for presence from Skype. Should I have?