I have a persistent hardware VPN tunnel which links a remote office to the main office. I cannot connect outlook clients over RPC as the exchange server uses a different gateway, not the hardware VPN router. I had planned to use RPC over HTTP however after attempting to implement it, i cannot get the machines to connect via HTTPS - all I get it the DIrectory Services via TCP to the DC (uses the VPN router gateway). I cannot seem to get it to use HTTPS only despite having both Fast and Slow boxes checked. I've installed the internal SSL certificate to the remote machines and can authenticate to the RPC directory. Any ideas?