I have an application that is using dotras to make a PPTP vpn connection to the office from field computers. I have included the phonebook entry string below.
Dim pbkEntry As DotRas.RasEntry = DotRas.RasEntry.CreateVpnEntry("dwr", "www.mydomain.com",
DotRas.RasVpnStrategy.Default, DotRas.RasDevice.GetDeviceByName("(PPTP)", DotRas.RasDeviceType.Vpn))
It works for almost everyone. However, two field staff, both saying they run Vista, get an error as follows when they try to connect.
"A certificate could not be found. Connections that use the L2TP protocol over IPSEC require the installation of ......."
Any idea what might be happening?