Run the below commands and make sure all 3 gives you hostnmae of vCSA

1. PNID of the vCenter server: # /usr/lib/vmware-vmafd/bin/vmafd-cli get-pnid --server-name localhost

2. Hostname of vCenter server: # hostname -f

3. And SAN (Subject Alternative Name) field of machine ssl cert: # openssl x509 -in machine.cer -noout -text | grep DNS: