Microsoft Office Communicator 2007 when client not on NT Domain

I'm trying to run Microsoft Office Communicator 2007 on client which is not part of an NT Domain, but which has VPN access to my corporate network. When trying to auth开发者_C百科enticate, however, MOC just hangs forever. Is there some way to configure MOC so that it connects, even if the client machine is not a member of the NT Domain?

I have verified that a corporate machine can connect from the same remote location, so it's not a networking issue.

I figured this out: you need to have the domain's certificate installed as a Trusted Root on the client machine. So, it's doable: you just need to really really trust the server if it's a self-signed certificate.