Hello,
Sorry for the conflict,
Try the following CLI from SSH to vcenter to list the admin accounts in the SSO domain: "/usr/lib/vmware-vmafd/bin/dir-cli group list --name Administrators".
If administrator@vsphere.local exist, try the reset process.
Don't hesitate to inform me to try something else.
Please consider marking this answer "CORRECT" or "Helpful" if you think your question have been answered correctly.
Cheers,
VCIX6-NV|VCP-NV|VCP-DC|