You can reset the root password of any (recent) VMWare appliance, such as the vCenter Server Appliance (VCSA), or Platform Services Controller (PSC) by following the procedure outlined here. Note that you will need to have physical or console access to perform the reset. The reset also requires a restart of the appliance so you'll need to schedule downtime for it.

First of, take a snapshot or backup of the virtual appliance before proceeding. In case the reset should fail, you'll always have a backup to go back to.

Restart the appliance. Right after the BIOS screen, the PhotonOS splash screen will appear for a few seconds.

During this time, press e to enter the GNU GRUB edit menu, allowin  ...