Ok, it seems that the root cert does not exist on the client then, that is the downside of using self signed certs, that you have to distribute the certificates to all clients. Was that done?
(Its much easier using a commercial certificate, then you can skip that step altogether.)
If you have OpenSSL installed you could use this string to find out more about the certificate being presented:
openssl s_client -showcerts -connect [ViewConnectionServer:443]
Are your PCoIP question regarding the View desktop certificate?
When connecting to a View desktop using PCoIP there are actually 2 connections being used, one on https (443) for the login procedure and broker communication and a second one for PCoIP (4172) for the display traffic. They are using different certificates and can be replaced. Its not very common to have to change the second one since this do not impact anything but sometime there is a policy to only use certificates that you control and then it makes sense.
Lets assume that you are only out to change the first one.
// Linjo
