How to Change ESX Host Root Password
Did you know that PowerVI includes a PowerShell script that lets you change the root password on multiple ESX host at one time. This is useful if you have a policy to change the passwords regularly, but want to keep the password the same across all hosts.
To change the password -
- Make sure PowerVI is installed.
- Open the vSphere client and connect to your vCenter
- Select all of the ESX Hosts that need to have their root password changed
- Right click and select “Set Host Root Password”

- PowerVI will launch a dialog that lets you specify the old password and set the new password.

- PowerVI will show you the progress as it changes the password for each of the selected hosts.
5 months ago - link

