I'm having problems with a remote 7961 not being able to use voice view via a site-to-site VPN.
Running CUE 2.3 and IOS 124-11.XJ4
3845 at the head end connected via IPSEC site-to-site to a 2811 at the remote end.
At the remote site the user presses the services button, is prompted and logs in. When he selects a message to view the phone gets stuck in 'requesting'.
He can access the same voice view account just fine using a phone at the headend. I had him take a proven phone from the head end to the remote site and he was still unable to retrieve a message via voice view.