Update on previous post - both vCenters now on 5.0 U2, same as the hosts. Still trying to add a host that was in the cluster back in.
Trying to understand what is going on, I've been tailing the logs when I attempt the host connection, and had the events log in vSphere client running. I noticed that just before it fails, I had:
...I also get:
on the host, I also have:
I've looked at the authentication resolution posts on the KB, they don't address the issue I have. We're going to have to reboot I think but the vms on this host are pretty vital.
Really need help fast on this.
Looking through a number of KB articles today tried lots of things, the main ones being:
Still not working. Going to reboot the host tomorrow evening.