Unable to refresh expired MACHINE SSL or Solution user certificate by certificate-manager option 3 or 6.
You might see log output like this.
ERROR: The following solution user certificates are expired [machine, vsphere-webclient, vpxd, vpxd-extension, hvc]
SOLUTION: Please use option 8 from the certificate-manager utility menu to reset the certificates
VMware vCenter Server
certificate-manager option 3 or 6 won't work if there is an expired certificate and it's expected behavior.
Currently, we recommend using vCert script for refreshing expired vCenter Server certificates, since vCert will work even though vCenter Server certificates are expired.