I honestly haven’t found a straight answer to this question. Does it connect via Edge or not?
Well, the short answer is yes! When I first installed Office it was almost a surprise when it installed a mac version of Communicator, pleasantly surprised too. I installed it, got it working on the lan and then jumped on a train armed with my 3G dongle. I fired it all up got Outlook connected without vpn and duly then expected Communicator to work. It didn’t.
I know that the Windows version was working fine, so I was confident I had no SRV funnies. I went to the forums/technet/support/google and found no answer, only some other folk asking similar questions. I loaded my vpn tunnel and presto, communicator connected. I tried again and again, on various internet connections, plain dsl etc, it didn’t work. I came to the conclusion it wasn’t in the feature set. Most answers in forums were to offer vpn, this just seemed a backward step and unnecessary admin overhead
Last week I installed the latest patch for Communicator 2011 (13.1.0 (101123)) and nosed around the desktop sharing feature and wrote my article on it here. I encouraged my colleagues and team to install the patch also. The following day, Nick in my team was working at home and left me a message to say he’d signed in via Edge!
Being the unbelieving pessimist I am, I had to see it for myself, I fired up 3G and presto, it took a little time, but it signed in over Edge on 443.
So, yes, it works, but only on the latest patch.