You can use the script in order to reset the Root password on an ESXi that is connected to a vCenter. The ESXi is not part of any domain and you don't have enough resources in order to use vCenter host profile to reset the account.

• Windows Server 2012 and above // Windows 10
• Powershell 5.1 and above
• PowerCLI either standalone or import the module in Powershell (Preferred)
• ESXi version 6.X
• ESXi must be part of a vCenter

Open Powershell or Powercli and run the script directly

  PS> reset_root.ps1

It will ask you for the vCenter name. You can either put FQDN or IP and a pop up for vCenter credentials will appear. You can use any account that has "Administrator" rights on vCenter. It is not necessary to use the administrator@vsphere.local

As soon as the script logs to the vCenter it will prompt a Table with all the ESXis that are connected to it. You select the one you want and click ok

Final step is to provide the new password. The script will reset the root account with the one you provided

• Will be there downtime during this activity?

  No there is no downtime. The script changes the password while the ESXi is in production

• Are there any steps to perform before running the script to the ESXi?

  No. You dont have to set the host to maintenance mode or migrate all the vms to some other host before running the script.

• When the password is changed is there some impact to vCenter?

  No. Host will still remain connected. There is no need to reconnect again the server because you change the root password.

• Can I select multiple ESXi hosts?

  No. At the moment it is only for a single change. If you want to reset the password to more ESXis you must run the script multiple times.