The following error may be found in /var/log/vmware/vmon/vmon.log and accompany service start failures.
dir-cli failed, error= An unknown option was present on the command line. 100001
This error can also be seen when attempting to create a service account with /usr/lib/vmware-vmafd/bin/dir-cli svcaccount create --name xxxxxxxx
vCenter Server 8.x
vCenter Server 9.x
The contents of /etc/likewise have been mistakenly deleted.
Restore the vCenter server from backup.