You can change the password for an encrypted virtual machine. Changing the password does not re-encrypt the virtual machine.
When you use this feature to change the password, the primary key used to decrypt the virtual machine is not changed, and the virtual machine is not re-encrypted. For security reasons, instead of changing the password by using this procedure, you might choose to remove encryption and then encrypt the virtual machine again with a different password.
Prerequisites
Power off the virtual machine.