As per theVMware Cloud Foundation Administration Guide, the official and supported process for moving all solution certificates under a Microsoft Certificate Authority, while keeping management and lifecycle operations compliant with SDDC Manager, is as follows:
C). Integrate the Microsoft CA into SDDC Manager.Exact Extract:
"To replace SSL certificates for VMware Cloud Foundation components using SDDC Manager, you must first integrate your Microsoft CA with SDDC Manager. This allows SDDC Manager to automate the certificate signing process using the organization's enterprise CA." F). In SDDC Manager, replace the SSL certificates for vCenter, ESXi, NSX Manager, SDDC Manager and Aria Suite Lifecycle.Exact Extract:
"With Microsoft CA integration, you can use SDDC Manager to generate and replace SSL certificates for all key solution components, including vCenter, ESXi, NSX Manager, SDDC Manager, and Aria Suite Lifecycle.
This process ensures full visibility and management through SDDC Manager." D). In SDDC Manager, replace the SSL certificates for vCenter, NSX Manager, SDDC Manager and Aria Suite Lifecycle.Exact Extract:
"Certificate replacement workflows in SDDC Manager allow you to select which managed components have their certificates replaced with CA-signed certificates. You must select and update all components that are not already using compliant CA-signed certificates." Why Not the Other Options?
A:ESXi certificate replacement should be managed via SDDC Manager for compliance, not directly in vCenter.
B:OpenSSL CA is not part of the company's security policy or supported by the current workflow.
E:Aria Suite Lifecycle and its components already use CA-signed certificates, so this action is not needed.
Summary:
To ensure compliance with the updated security policy and maintain management with SDDC Manager, the administrator must:
Integrate the Microsoft CA into SDDC Manager (C),
Use SDDC Manager to replace all relevant solution SSL certificates for vCenter, ESXi, NSX Manager, SDDC Manager, and Aria Suite Lifecycle (F), And use SDDC Manager's certificate replacement workflow to update any components still requiring CA- signed certificates (D).These steps are mandated and supported by VMware Cloud Foundation official documentation.

You must configure and register a Key Management Server in vCenter to handle encryption keys.
An encryption policy is created in vCenter to define the encryption settings that VMs will use.
You then apply the encryption policy to the existing VMs to encrypt their disks.
https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/8-0/vsphere-security-8-0/use-encryption-in- your-vsphere-environment/encrypt-an-existing-virtual-machine-or-virtual-disk.html

When an ESXi host is in a "Not Responding" state in VMware Cloud Foundation, the first step in troubleshooting is to check the network connectivity between the ESXi host and the SDDC Manager.
Network issues (e.g., misconfigured VLANs, firewall settings, or network outages) are often the primary cause of communication problems between SDDC Manager and the ESXi host.