About the SSL cert in the VASA (for vVOL)

It is found that after the first esxi server had configured the storage provider with UnityVSA, the SSL cert used in the VASA (UnityVSA side) is a self signed cert.

The SSL cert could be viewed by https://UNITYVSA_IP_ADDRESS:8443/vasa/version.xml

I have two questions for the SSL cert:

1) the Organization of the issuer of the SSL cert would be the hostname of the first vcenter server to configure with the UnityVSA

When user setup the next vCenter to configure the storage provider, I am confused to see that there is another vCenter server name appear in the SSL cert.

2) The SSL cert valid period is only one year.
Would it be a problem if the SSL cert expire? And would it automatically renewed?

Thanks,

Patrick