I've just finished an upgrade process on one of our hosts from ESXi 3.5 to 4.0. All seemed to go well, the vSphere upgrade utility crashed after the upgrade process reached 100% but it happened to me before so i ignored it. The host booted up fine but now i cannot logi in to it using the vSphere client. the message i get says "Cannot complete login due to an incorrect user name or password." I've changed the password few times and it works when I'm logged on locally to the server, i.e. I can shut it down or change config. The authentication doesn't work throught the host's website. Has any one eperienced similar issue and know how to reslove it?