CSR for ESXi 6.0 using Certificate manager

Hi,

Currently in our production enviornment we are using default self signed certificates on all of our ESXi 6.0 hosts. I need to replace default certificates with CA signed certificates on all of ESXi Hosts.

Can I use Certificate manager to generate CSR for ESXi Hosts? Or I need to use OpenSSL.

Kindly suggest

Thanks

Rajat