I have custom certificates between vCenter and ESXi. I noticed that the certificate the vSphere client is using to talk to ESXi for an IOFILTER (under vcenter -> Storage Providers) is a certificate that does not match ESXi as I have custom certs.
I see there is a "Refresh certificate" button but it is grayed out. Is there a way to change the IOFILTER Provider certificate to a custom one?