I recently had to restore our vCenter Server 5.0.1 database (VCDB). After the restore some of the hosts where showing up with red exclamation mark. I removed HA and re-enabled but it didn’t work. I also tried putting the host in maintenance mode but was greeted with “Cannot synchronize host ESXi…. Cannot complete login due to an incorrect username or password”.
The solution was simple:
– Re-register the vpxuser account by:
– Right click on the ESXi 5.0 host and select disconnect – accept the warning message. The VM’s that are running on the host will continue without disruption.
– Once disconnected then reconnect the host again. You will be prompted to enter username and password of the host.