Symptoms:
To resolve this issue, see KB: ESX/ESXi host fails to update information with the error: vmware esx cannot synchronize host.
If this resolution is unsuccessful, update the vpxuser account on the host. To update the vpxuser account on the host:
If the host reconnect is failing, please refer to the KB article: ESXi host fails to reconnect to vCenter with the error 'The operation is not allowed in the current state'.