Hi,
Not sure how far everyone has got on this painful issue, but I have the following setup in a virtual lab:-
ESXi Host 1 running version 5.0 U2
ESXi Host 2 running version 5.1
Both hosts have SSL enabled via the advanced settings options in the client (default setting)
I am running vmrc 5.1 which came with the 5.1 SDK and the shortcut im using to connect to the 5.1 host is "C:\Program Files\Common Files\VMware\VMware VMRC Plug-in\Internet Explorer\vmware-vmrc.exe" -X -h "192.168.0.131" -u "root" -p "Password" "[lab-Local-151] win7/win7.vmx"
This works fine, console access is presented via the vmrc session and also still available via the vSphere client. This is also still fine when connecting to a 5.0 U2 host.
When using VMRC Version 2.5 (or pretty much any legacy version of VMRC) when connecting to 5.1 host I get the error:-
Unable to connect to the MKS: Internal error.
Not sure if this helps anyone? but I think this is pretty much what Vmware technical advised earlier in this post..
Cheers