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You can use the following vSphere Certificate Manager options:
n
Replace Machine SSL Certificate with Custom Certificate
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Replace Solution User Certificates with Custom Certificates
For manual certificate replacement, see Use Custom Certificates With vSphere.
Hybrid Deployment
You can have VMCA supply some of the certificates, but use custom certificates for other parts of your
infrastructure. For example, because solution user certificates are used only to authenticate to vCenter
Single Sign-On, consider having VMCA provision those certificates. Replace the machine SSL certificates
with custom certificates to secure all SSL traffic.
Company policy often does not allow intermediate CAs. For those cases, hybrid deployment is a good
solution. It minimizes the number of certificates to replace, and secures all traffic. The hybrid deployment
leaves only internal traffic, that is, solution user traffic, to use the default VMCA-signed certificates
ESXi Certificate Replacement
For ESXi hosts, you can change certificate provisioning behavior from the vSphere Web Client. See the
vSphere Security documentation for details.
Table 34. ESXi Certificate Replacement Options
Option Description
VMware Certificate Authority mode (default) When you renew certificates from the vSphere Web Client,
VMCA issues the certificates for the hosts. If you changed the
VMCA root certificate to include a certificate chain, the host
certificates include the full chain.
Custom Certificate Authority mode Allows you to manually update and use certificates that are not
signed or issued by VMCA.
Thumbprint mode Can be used to retain 5.5 certificates during refresh. Use this
mode only temporarily in debugging situations.
Where vSphere Uses Certificates
In vSphere 6.0 and later, the VMware Certificate Authority (VMCA) provisions your environment with
certificates. Certificates include machine SSL certificates for secure connections, solution user certificates
for authentication of services to vCenter Single Sign-On, and certificates for ESXi hosts.
The following certificates are in use.
Table 35. Certificates in vSphere 6.0 and Later
Certificate Provisioned Comments
ESXi certificates VMCA (default) Stored locally on ESXi host
Machine SSL certificates VMCA (default) Stored in VECS
Solution user certificates VMCA (default) Stored in VECS
Platform Services Controller Administration
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